| 1A-CERT (FR) | France | Accredited (since 16 Sep 2022) |
| A2A-CERT (IT) | Italy | Accredited (since 24 May 2022) |
| AC-CSIRT (CZ) | Czech Republic | Accredited (since 13 Mar 2024) |
| ACD-TRC (ES) | Spain | Accredited (since 09 Apr 2024) |
| ACOnet-CERT | Austria | Accredited (since 28 Mar 2003) |
| AEC | Austria | Certified (since 30 Jun 2020) |
| AKCESK/NAECCS (AL) | Albania | Accredited (since 27 May 2020) |
| ALEF-CSIRT | Czech Republic | Certified (since 16 Jul 2020) |
| AM-CERT (AM) | Armenia | Accredited (since 04 Jan 2024) |
| AR-CSIRT (PT) | Portugal | Accredited (since 21 Feb 2023) |
| ATS-CSIRT (CZ) | Czech Republic | Accredited (since 02 Sep 2024) |
| AXENTA CSIRT | Czech Republic | Accredited (since 25 Feb 2019) |
| Ai CERT | France | Accredited (since 27 May 2015) |
| AndaluciaCERT | Spain | Accredited (since 14 May 2018) |
| AzScienceCERT (AZ) | Azerbaijan | Accredited (since 30 May 2011) |
| BARIKAT-CSIRT | Turkey | Accredited (since 03 Mar 2022) |
| BASF gCERT | Germany | Accredited (since 21 Nov 2022) |
| BCR CERT (RO) | Romania | Accredited (since 04 Jan 2024) |
| BELNET CERT | Belgium | Accredited (since 14 Sep 2004) |
| BF-SIRT | Sweden | Accredited (since 19 Jun 2017) |
| BGD e-GOV CIRT | Bangladesh | Accredited (since 28 Nov 2018) |
| BSS-CERT | Romania | Accredited (since 14 Apr 2021) |
| Bayern-CERT (DE) | Germany | Accredited (since 15 Jul 2022) |
| BeSOC Madrid (ES) | Spain | Accredited (since 01 Mar 2023) |
| BeSOC-Roma (IT) | Italy | Accreditation Suspended (since 07 Dec 2024) |
| Binconf CDC (SK) | Slovakia | Accredited (since 20 Sep 2018) |
| Botswana-CSIRT (BW) | Botswana | Accredited (since 30 Aug 2024) |
| CARICERT | Curacao | Accredited (since 26 May 2014) |
| CATALONIA-CERT (ES) | Spain | Accredited (since 25 Dec 2010) |
| CCN-CERT | Spain | Accredited (since 25 Jan 2008) |
| CDC AEC (CZ) | Czech Republic | Certification Candidate (since 14 Jun 2024) |
| CERT ACL (PL) | Poland | Accredited (since 22 Jun 2023) |
| CERT ALLEGRO | Poland | Accredited (since 21 Oct 2019) |
| CERT Alior | Poland | Accredited (since 26 Aug 2019) |
| CERT BIK | Poland | Accredited (since 20 Nov 2020) |
| CERT BWI | Germany | Certified (since 21 Oct 2015) |
| CERT Bulgaria | Bulgaria | Accredited (since 12 Jul 2009) |
| CERT CM EI (FR) | France | Accredited (since 17 Oct 2022) |
| CERT Credit Agricole | France | Certified (since 08 Sep 2021) |
| CERT ENEA (PL) | Poland | Accredited (since 13 Dec 2022) |
| CERT Groupe BPCE | France | Accredited (since 03 May 2019) |
| CERT IT-PKP (PL) | Poland | Accredited (since 22 Nov 2022) |
| CERT La Poste | France | Accredited (since 27 Mar 2015) |
| CERT NRW (DE) | Germany | Accredited (since 17 Mar 2025) |
| CERT OPL | Poland | Re-Certification Candidate (since 13 May 2025) |
| CERT ORLEN | Poland | Accredited (since 26 Feb 2021) |
| CERT Orange Cyberdefense | France | Accredited (since 21 Sep 2009) |
| CERT Orange Romania (RO) | Romania | Accredited (since 10 May 2024) |
| CERT PKO BP | Poland | Certified (since 28 Jan 2020) |
| CERT POLSKA | Poland | Re-Certification Candidate (since 13 Jun 2024) |
| CERT PSE | Poland | Re-Certification Candidate (since 10 May 2022) |
| CERT RS (RS) | Bosnia Hercegovina | Accredited (since 16 Apr 2020) |
| CERT Radical (EC) | Ecuador | Accredited (since 18 Oct 2024) |
| CERT SG | France | Accredited (since 12 Nov 2018) |
| CERT SysDream (FR) | France | Accredited (since 15 Sep 2022) |
| CERT TMPL | Poland | Accredited (since 31 Aug 2018) |
| CERT mBank | Poland | Accredited (since 03 Nov 2017) |
| CERT-AA (DE) | Germany | Accredited (since 21 Jan 2025) |
| CERT-AGID | Italy | Accredited (since 19 Jul 2016) |
| CERT-AKAOMA (FR) | France | Accredited (since 19 Jul 2024) |
| CERT-AM | Armenia | Accredited (since 13 Jan 2014) |
| CERT-BDF | France | Accredited (since 09 Apr 2015) |
| CERT-Bund | Germany | Accredited (since 12 Sep 2012) |
| CERT-C Capgemini Group (FR) | France | Accredited (since 09 Jun 2023) |
| CERT-CDCFR | France | Accredited (since 23 May 2016) |
| CERT-DVT | France | Accredited (since 01 Feb 2011) |
| CERT-EE | Estonia | Certified (since 20 Sep 2017) |
| CERT-ENAV | Italy | Accredited (since 26 Apr 2018) |
| CERT-EU | *European Union | Accredited (since 02 May 2013) |
| CERT-GIB | Singapore | Accredited (since 15 Jan 2013) |
| CERT-GOV-MD | Moldova, Republic Of | Accredited (since 13 Jan 2014) |
| CERT-INN (IT) | Italy | Accredited (since 20 Sep 2023) |
| CERT-IS (IS) | Iceland | Accredited (since 17 May 2023) |
| CERT-In (IN) | India | Accredited (since 13 Sep 2022) |
| CERT-MC (MC) | Monaco | Accredited (since 12 Jul 2022) |
| CERT-MU (MU) | Mauritius | Certified (since 14 May 2024) |
| CERT-Post | Switzerland | Accredited (since 21 Oct 2019) |
| CERT-Renater | France | Accredited (since 30 Sep 2001) |
| CERT-SE (SE) | Sweden | Certified (since 16 Nov 2011) |
| CERT-Ubisoft | France | Accredited (since 07 Jul 2020) |
| CERT-VW | Germany | Accredited (since 02 Dec 2003) |
| CERT-W | France | Accredited (since 07 Jul 2014) |
| CERT-WM (NL) | Netherlands | Accredited (since 03 Dec 2024) |
| CERT-WuerthPhoenix (IT) | Italy | Accredited (since 17 Apr 2023) |
| CERT-XMCO (FR) | France | Accredited (since 31 Aug 2018) |
| CERT-Yoroi | Italy | Certified (since 29 Dec 2020) |
| CERT.AZ | Azerbaijan | Accredited (since 20 Jan 2015) |
| CERT.DGA.GOV.GE | Georgia | Accredited (since 24 May 2012) |
| CERT.GOV.AZ | Azerbaijan | Accredited (since 17 Aug 2012) |
| CERT.LV (LV) | Latvia | Re-Certification Candidate (since 01 May 2025) |
| CERT.NETWORKS.PL (PL) | Poland | Certification Candidate (since 14 Oct 2024) |
| CERT.PT | Portugal | Re-Certification Candidate (since 14 Jan 2025) |
| CERT.at | Austria | Certified (since 05 Feb 2018) |
| CERT.be | Belgium | Accredited (since 22 Jan 2010) |
| CERT.br (BR) | Brazil | Accredited (since 31 Mar 2020) |
| CERT.hr | Croatia | Accredited (since 22 Jan 2010) |
| CERTBI | Italy | Certified (since 13 Jan 2025) |
| CERTEGO | Italy | Certification Candidate (since 14 Dec 2023) |
| CERTFin (IT) | Italy | Accredited (since 02 Oct 2019) |
| CESNET-CERTS | Czech Republic | Accredited (since 27 Jan 2008) |
| CFCS | Denmark | Accredited (since 12 Oct 2011) |
| CIES CSIRT | Spain | Accredited (since 27 Jan 2022) |
| CIPHER-CSIRT | Portugal | Certified (since 10 Dec 2019) |
| CIRCL | Luxembourg | Accredited (since 19 Sep 2011) |
| CORIS-STS | Romania | Accredited (since 30 May 2011) |
| CS-CSIRT | Czech Republic | Accredited (since 23 Jan 2019) |
| CSA Global CSIRT (ES) | *European Union | Accredited (since 23 Oct 2024) |
| CSGN-CERT | Romania | Accredited (since 04 Feb 2015) |
| CSI-RT | Italy | Accredited (since 07 Jul 2021) |
| CSIRT CSAS (CZ) | Czech Republic | Certified (since 10 Mar 2022) |
| CSIRT FCT (PT) | Portugal | Re-Certification Candidate (since 11 Oct 2024) |
| CSIRT KNF (PL) | Poland | Accredited (since 07 Jul 2021) |
| CSIRT-AD (AD) | Andorra | Accredited (since 17 Apr 2023) |
| CSIRT-BOS (PL) | Poland | Accredited (since 27 Jun 2023) |
| CSIRT-CV | Spain | Accredited (since 27 Sep 2011) |
| CSIRT-DCeGOV (CZ) | Czech Republic | Accredited (since 14 Jan 2025) |
| CSIRT-Equans (FR) | France | Accredited (since 12 Mar 2025) |
| CSIRT-IE | Ireland | Accredited (since 28 Nov 2017) |
| CSIRT-IT | Italy | Accredited (since 24 May 2022) |
| CSIRT-MU (CZ) | Czech Republic | Re-Certification Candidate (since 10 Jan 2024) |
| CSIRT-NBU (UA) | Ukraine | Accredited (since 16 Jul 2024) |
| CSIRT-NEOSOFT (FR) | France | Accredited (since 20 Jul 2017) |
| CSIRT-SATEC (ES) | Spain | Accredited (since 13 Nov 2022) |
| CSIRT-SPCSS (CZ) | Czech Republic | Certified (since 09 May 2025) |
| CSIRT-UPJS | Slovakia | Accredited (since 19 Oct 2020) |
| CSIRT-VUT (CZ) | Czech Republic | Accredited (since 18 Sep 2022) |
| CSIRT.CZ | Czech Republic | Certified (since 16 Nov 2018) |
| CSIRT.MIL.SK | Slovakia | Accredited (since 12 Feb 2018) |
| CSIRT.SK | Slovakia | Certified (since 10 May 2025) |
| CSIRT.UPORTO | Portugal | Accredited (since 01 Jul 2007) |
| CSIRT.gal | Spain | Accredited (since 10 Aug 2021) |
| CSOC LKPR (CZ) | Czech Republic | Accredited (since 05 Jun 2024) |
| CSOC-ARIA (IT) | Italy | Accredited (since 09 Feb 2024) |
| CSUC-CSIRT | Spain | Accredited (since 13 Jan 2015) |
| CYBER CIRCLE CSIRT (LV) | Latvia | Accredited (since 17 Apr 2023) |
| CYMED (RO) | Romania | Accredited (since 05 Feb 2021) |
| CYNET-CSIRT | Cyprus | Accredited (since 19 Aug 2021) |
| CZ.NIC-CSIRT | Czech Republic | Accredited (since 26 Aug 2010) |
| Caixabank CSIRT (ES) | Spain | Accredited (since 13 Jul 2017) |
| Cert-IST | France | Accredited (since 14 Mar 2006) |
| CiviCERT | *World Wide | Accredited (since 24 Mar 2016) |
| ComCERT.PL | Poland | Accredited (since 02 Jun 2016) |
| Computest-CERT (NL) | Netherlands | Accredited (since 30 Nov 2022) |
| Cyberzaintza (ES) | Spain | Accredited (since 30 Apr 2021) |
| DBG-CERT (DE) | Germany | Accredited (since 02 Jul 2020) |
| DELOITTE EDC (ES) | Spain | Accredited (since 18 Jul 2023) |
| DFN-CERT | Germany | Re-Certification Candidate (since 03 Jun 2021) |
| DKCERT | Denmark | Certified (since 26 Feb 2024) |
| DNSC | Romania | Accredited (since 09 Mar 2012) |
| Deutsche Telekom CERT | Germany | Certified (since 16 Jul 2020) |
| Dubex IRT (DK) | Denmark | Accredited (since 05 Jul 2024) |
| E.ON CERT | Germany | Accredited (since 13 Oct 2015) |
| E.ON CERT PL | Poland | Accredited (since 31 Aug 2021) |
| EATM-CERT | Belgium | Accredited (since 19 Mar 2020) |
| EC Cybersecurity Operations Centre | *European Union | Accredited (since 15 Nov 2019) |
| EDF CIRC | Estonia | Accredited (since 10 Jun 2016) |
| EGI CSIRT | *Europe | Certified (since 02 Oct 2014) |
| EL-CSIRT (IT) | Italy | Accredited (since 05 Jan 2024) |
| ENERGOTEL.SK-CSIRT | Slovakia | Accredited (since 13 Nov 2022) |
| ENOC-CSIRT (ES) | Spain | Accredited (since 21 Jun 2022) |
| ERIS-CERT (ES) | Spain | Accredited (since 25 Jun 2018) |
| ESACERT | *Europe | Certified (since 30 Apr 2021) |
| ESP DEF CERT | Spain | Accredited (since 18 Jul 2013) |
| ETDA (TH) | Thailand | Accredited (since 01 Oct 2015) |
| ETH CSIRT (CH) | Switzerland | Re-Certification Candidate (since 24 Feb 2021) |
| EXN-GSOC (BE) | Belgium | Certified (since 10 Jan 2024) |
| EY CSIRT (FR) | France | Accredited (since 16 Nov 2022) |
| Enel CERT (IT) | Italy | Accredited (since 29 May 2018) |
| Ericsson PSIRT | Finland | Accredited (since 25 Nov 2005) |
| Eurofins SOC (PL) | Poland | Accredited (since 14 Nov 2023) |
| Euronext CSIRT | Portugal | Accredited (since 18 Dec 2019) |
| FS-CERT (IT) | Italy | Accreditation Suspended (since 30 Sep 2024) |
| FoxCERT | Netherlands | Accredited (since 01 Oct 2014) |
| Funet CERT | Finland | Accredited (since 21 Apr 2002) |
| G-SIRT | Italy | Accredited (since 07 Feb 2020) |
| GARR-CERT (IT) | Italy | Accredited (since 01 Jan 2001) |
| GAZ-SYSTEM CERT | Poland | Certified (since 10 Aug 2021) |
| GC-CSIRT (SE) | Sweden | Accredited (since 23 Aug 2023) |
| GEANT CERT | *Europe | Certified (since 22 Jun 2015) |
| GOVCERT.CZ | Czech Republic | Accredited (since 21 Aug 2014) |
| GOVCERT.LU | Luxembourg | Certified (since 26 Sep 2024) |
| GRAIL-CSIRT (ES) | Spain | Accredited (since 28 Jul 2023) |
| GRNET-CERT | Greece | Accredited (since 07 Apr 2003) |
| Gen CERT (CZ) | Czech Republic | Accredited (since 14 Dec 2020) |
| GovCERT Austria | Austria | Accredited (since 29 Jun 2021) |
| GovCERT.ch | Switzerland | Accredited (since 21 Aug 2014) |
| HWG-CERT (IT) | Italy | Certification Candidate (since 10 Jul 2024) |
| Handelsbanken SIRT | Sweden | Accredited (since 09 Jan 2012) |
| HealthNet-CSIRT | Luxembourg | Accredited (since 29 Nov 2017) |
| IBD | Netherlands | Certification Candidate (since 06 Feb 2024) |
| IGNITIS CSIRT (LT) | Lithuania | Accredited (since 16 Sep 2022) |
| INCIBE-CERT | Spain | Certified (since 26 Feb 2024) |
| IRISSCERT | Ireland | Accredited (since 16 May 2010) |
| ITXCSIRT (ES) | Spain | Accredited (since 23 Sep 2022) |
| Infineon CDC | Germany | Certified (since 26 Feb 2024) |
| Innotec Security (ES) | Spain | Accredited (since 14 Oct 2016) |
| IstroCSIRT (SK) | Slovakia | Accredited (since 17 Sep 2022) |
| JCSC (JE) | Jersey | Accredited (since 03 Nov 2023) |
| JN DATA CDC | Denmark | Certified (since 18 Dec 2020) |
| Jisc CSIRT (UK) | United Kingdom | Accredited (since 01 Jan 2001) |
| Jo-FinCERT (JO) | Jordan | Accredited (since 13 Mar 2024) |
| KBC Group CERT | Belgium | Accredited (since 22 Feb 2016) |
| KIT-CERT | Germany | Certified (since 26 Sep 2024) |
| KOS-CERT | Kosovo, Republic Of | Accredited (since 03 Jul 2017) |
| KPN-CERT | Netherlands | Certified (since 27 Mar 2012) |
| KVTC-CERT | Lithuania | Accredited (since 19 Oct 2009) |
| KZ-CERT | Kazakhstan | Accreditation Suspended (since 05 Oct 2023) |
| Kering-CERT (FR) | France | Accredited (since 17 May 2024) |
| Kindred-CSIRT (SE) | Sweden | Accredited (since 02 May 2022) |
| KrCERT/CC (KR) | Korea, Republic Of | Certified (since 26 Feb 2024) |
| KraftCERT | Norway | Certified (since 15 Mar 2021) |
| LAYER8 CSIRT (PT) | Portugal | Accredited (since 30 Nov 2022) |
| LDO-CERT | Italy | Accredited (since 21 Jun 2019) |
| LE-CERT | Spain | Accredited (since 28 Jan 2021) |
| LION-CSIRT (IT) | Italy | Accredited (since 31 May 2024) |
| LITNET CERT | Lithuania | Accredited (since 27 Jan 2005) |
| LiU IRT | Sweden | Certified (since 07 Nov 2014) |
| MKD-CIRT | North Macedonia | Accredited (since 08 Dec 2017) |
| MUP CERT | Serbia | Accredited (since 23 Nov 2018) |
| MYCD-CERT (ES) | Spain | Accredited (since 26 Jul 2024) |
| NAIS G-CSIRT (AL) | Albania | Accredited (since 08 Jan 2025) |
| NCSC (UK) | United Kingdom | Accreditation Suspended (since 28 Jan 2020) |
| NCSC-FI | Finland | Re-Certification Candidate (since 22 Jan 2025) |
| NCSC-Hungary | Hungary | Accredited (since 14 Feb 2006) |
| NCSC-NL | Netherlands | Certified (since 26 Nov 2010) |
| NCSC-NO | Norway | Accredited (since 26 Jan 2007) |
| NCZI CSIRT (SK) | Slovakia | Accredited (since 11 Dec 2024) |
| NESTOR (CZ) | Czech Republic | Certified (since 13 Jan 2025) |
| NEXI CDC (IT) | Italy | Accredited (since 10 Jun 2020) |
| NKSC/CERT-LT | Lithuania | Accredited (since 16 Jan 2009) |
| NN-GROUP CSIRT | Czech Republic | Accredited (since 05 Nov 2020) |
| NORDUnet CERT | *Europe | Re-Certification Candidate (since 17 Feb 2025) |
| NRD CIRT | Lithuania | Accredited (since 03 Mar 2017) |
| NVISO-CSIRT | Belgium | Accredited (since 09 Apr 2018) |
| NW-CERT | Netherlands | Accredited (since 31 Mar 2021) |
| National CSIRT-CY (CY) | Cyprus | Certification Candidate (since 12 Jun 2025) |
| National Cybersecurity Authority (SA) | Saudi Arabia | Accredited (since 15 Jun 2020) |
| NavCERT | France | Accredited (since 20 Apr 2020) |
| O2.cz CERT (CZ) | Czech Republic | Accredited (since 21 Nov 2023) |
| OBRELA-CSIRT (GR) | Greece | Accredited (since 22 Nov 2024) |
| OCINT-CSIRT (CH) | Switzerland | Accredited (since 06 Jun 2024) |
| OS-CERT (CH) | Switzerland | Accredited (since 14 Nov 2016) |
| Omni (RO) | Romania | Accredited (since 26 Sep 2024) |
| OneCyber CERT (ES) | Spain | Accredited (since 05 Jul 2024) |
| OneseQ CERT (ES) | Spain | Accredited (since 16 Sep 2022) |
| OxCERT | United Kingdom | Accredited (since 26 Mar 2019) |
| PGE-CERT (PL) | Poland | Re-Certification Candidate (since 10 May 2022) |
| PGGM-CERT | Netherlands | Accredited (since 10 Jun 2021) |
| PI-CERT (IT) | Italy | Accredited (since 03 Dec 2013) |
| PIONIER-CERT (PL) | Poland | Accredited (since 09 Feb 2024) |
| POLI-CERT (IT) | Italy | Accredited (since 05 Aug 2021) |
| PRE-CERT | Germany | Accredited (since 12 Jun 2002) |
| PXS-CSIRT | Belgium | Re-Certification Candidate (since 08 Nov 2023) |
| PXS-LU-CSIRT (LU) | Luxembourg | Accredited (since 25 Mar 2016) |
| Panasonic PSIRT | Japan | Accredited (since 19 Aug 2013) |
| RESTENA-CSIRT | Luxembourg | Accredited (since 21 Apr 2009) |
| RH-ISIRT | *World Wide | Accredited (since 05 Jun 2018) |
| RIPE NCC CSIRT | Netherlands | Accredited (since 15 Dec 2014) |
| RNIDS-CERT (RS) | Serbia | Accredited (since 04 Sep 2023) |
| RU-CERT | Russian Federation | Accreditation Suspended (since 28 Feb 2022) |
| RUS-CERT | Germany | Accredited (since 15 Mar 2002) |
| Rapid7 CSIRT (US) | United States | Accredited (since 20 Mar 2025) |
| RedIRIS | Spain | Accredited (since 23 Mar 2001) |
| RevelSi CSIRT (RO) | Romania | Accredited (since 18 Jun 2022) |
| RoCSIRT (RO) | Romania | Accredited (since 12 Jul 2009) |
| S-CERT | Germany | Accredited (since 10 Oct 2002) |
| S2 Grupo CERT (ES) | Spain | Accredited (since 19 Apr 2016) |
| S21sec CERT | Spain | Accredited (since 19 Sep 2011) |
| SA NREN CSIRT | South Africa | Accredited (since 15 Nov 2018) |
| SAND-CSIRT | *World Wide | Accredited (since 16 Jul 2020) |
| SBAB-SIRT | Sweden | Accredited (since 10 Jul 2017) |
| SEB CSIRT (SE) | Sweden | Accredited (since 23 Sep 2016) |
| SHARE CERT | Serbia | Accredited (since 28 Dec 2018) |
| SI-CERT | Slovenia | Accredited (since 03 Jul 2001) |
| SIGOV-CERT (SI) | Slovenia | Accredited (since 10 Jul 2024) |
| SK-CERT | Slovakia | Certified (since 26 Mar 2020) |
| SOC Thein (CZ) | Czech Republic | Accredited (since 19 Mar 2025) |
| SOC Trecom (PL) | Poland | Accredited (since 03 Apr 2024) |
| SOC-Corpus | Czech Republic | Accredited (since 24 Oct 2018) |
| SOC-GSE | Italy | Accredited (since 23 Nov 2017) |
| SOC24.PL | Poland | Accredited (since 28 Jan 2019) |
| SOC365 CSIRT (CZ) | Czech Republic | Accredited (since 23 Dec 2022) |
| SOCA | Czech Republic | Accredited (since 10 Feb 2017) |
| SPCS CSIRT (CH) | Switzerland | Accredited (since 10 May 2024) |
| SRB-CERT | Serbia | Accredited (since 09 Aug 2019) |
| STI CERT | Romania | Accredited (since 20 Nov 2015) |
| SUNET CERT | Sweden | Accredited (since 23 May 2002) |
| SURFcert | Netherlands | Certified (since 25 Aug 2023) |
| SWITCH-CERT | Switzerland | Certified (since 02 Jun 2011) |
| SZ SOC (CZ) | Czech Republic | Accredited (since 07 Aug 2024) |
| SektorCERT (DK) | Denmark | Accredited (since 23 Aug 2021) |
| SentorSOC (SE) | Sweden | Accredited (since 16 Oct 2024) |
| Siemens CERT | Germany | Accredited (since 23 Mar 2001) |
| SmartSOC (PL) | Poland | Accredited (since 18 Dec 2024) |
| Sorint.SEC (IT) | Italy | Accredited (since 16 Oct 2024) |
| StACSIRT | United Kingdom | Accredited (since 19 Jan 2018) |
| Swedbank CDC | Sweden | Certified (since 20 Sep 2023) |
| TCS-CERT (LU) | Luxembourg | Certified (since 31 Aug 2023) |
| TDC NET CDC (DK) | Denmark | Certified (since 20 Sep 2023) |
| TERNA-CERT | Italy | Accredited (since 06 May 2019) |
| THA-CERT | *World Wide | Accredited (since 18 Sep 2017) |
| TMCZ CSIRT | Czech Republic | Accredited (since 16 Feb 2021) |
| TR-CERT | Turkey | Accredited (since 17 Jun 2008) |
| TS CSIRT | Czech Republic | Accredited (since 28 Feb 2020) |
| TSLO-CERT (SI) | Slovenia | Accredited (since 02 Jun 2021) |
| Team Cymru | *World Wide | Accredited (since 26 Aug 2010) |
| TeliaCERT | Sweden | Certified (since 29 Sep 2011) |
| Truesec-CSIRT (SE) | Sweden | Certified (since 31 Aug 2023) |
| TurkTelekom-CSIRT (TR) | Turkey | Accredited (since 27 Aug 2019) |
| UBT-CERT | Kosovo, Republic Of | Accredited (since 01 Aug 2018) |
| ULAK-CSIRT | Turkey | Accredited (since 14 Jul 2007) |
| UNICOM CERT (RS) | Serbia | Accredited (since 21 Apr 2022) |
| UNT-CERT (IT) | Italy | Accredited (since 17 Apr 2023) |
| UU-CSIRT | Sweden | Accredited (since 09 Oct 2015) |
| UiO-CERT | Norway | Certified (since 26 Feb 2024) |
| UniMS-CERT (DE) | Germany | Accredited (since 19 May 2021) |
| VDE | Germany | Accredited (since 03 Feb 2018) |
| VINCI-CERT | France | Accredited (since 02 Oct 2020) |
| VOID SOC | Slovakia | Accredited (since 01 Nov 2019) |
| Versia-CSIRT (ES) | Spain | Accredited (since 24 May 2023) |
| WienCERT | Austria | Re-Certification Candidate (since 04 Dec 2020) |
| XING (DE) | Germany | Accredited (since 26 Mar 2014) |
| Z-CERT (NL) | Netherlands | Certified (since 27 Feb 2025) |
| aeCERT (AE) | United Arab Emirates | Accredited (since 31 May 2022) |
| csirtMEO (PT) | Portugal | Accredited (since 06 Apr 2012) |
| eduCSC-NO (NO) | Norway | Certified (since 31 Jan 2014) |
| esCERT-UPC (ES) | Spain | Accredited (since 30 Sep 2001) |
| gematik CERT (DE) | Germany | Accredited (since 16 Apr 2024) |
| govmtCSIRT (MT) | Malta | Accredited (since 24 May 2004) |
| itm8 CDC (DK) | Denmark | Certified (since 09 May 2025) |
| itm8 CSIRT (DK) | Denmark | Certification Candidate (since 03 Apr 2025) |
| mIRT | Norway | Accredited (since 08 May 2017) |
| sCERT AT | Austria | Accredited (since 16 Jan 2020) |
| tk CERT | Germany | Accredited (since 05 Feb 2014) |