| Issuing ExTL | ExTR Ref. Number | Manufacturer | Standards covered | |
| 256 | BAS - Baseefa |  |
| 31 | BAS - SGS Baseefa Limited |  |
| 6 | BKI - Testing Station for Explosion Proof Equipment |  |
| 202 | BVS - DEKRA EXAM GmbH |  |
| 3 | CCVE - NANIO "CCVE" |  |
| 35 | CES - CESI |  |
| 18 | CQST - China National Quality Supervision and Test |  |
| 50 | CSA - CSA International |  |
| 161 | DEK - DEKRA Certification B.V. |  |
| 21 | DNV - DNV |  |
| 52 | EPS - Bureau Veritas Consumer Products Services Germany GmbH |  |
| 15 | ETL - Intertek |  |
| 107 | FMG - FM Approvals LLC |  |
| 31 | FTZU - Fyzikalne technicky zkusebni ustav |  |
| 44 | IBE - IBExU Institut für Sicherheitstechnik GmbH |  |
| 67 | INE - INERIS |  |
| 26 | ITA - TUV Rheinland Australia Pty. Ltd |  |
| 62 | ITS - Intertek Testing & Certification Limited |  |
| 8 | KDB - Central Mining Institute Experimental Mine "Barbara" |  |
| 9 | KDB - Główny Instytut Górnictwa, Kopalnia Doświadczalna „BARBARA” |  |
| 27 | KEM - DEKRA Certification B.V. |  |
| 35 | KGS - Korea Gas Safety Corporation |  |
| 3 | KOS - Korea Occupational Safety and Health Agency (KOSHA) |  |
| 15 | KTL - Korea Testing Laboratory |  |
| 68 | LCI - Laboratoire Central des Industries Electriques (LCIE) |  |
| 32 | LCIE - Laboratoire Central des Industries Electriques (LCIE) |  |
| 2 | MST - Mine Safety Technology Centre (MSTC), |  |
| 27 | NEM - NEMKO |  |
| 21 | NEPSI - National Supervision and Inspection Centre for |  |
| 32 | PCEC - Supervision & test Centre of Ex-products of |  |
| 138 | PTB - Physikalisch-Technische Bundesanstalt (PTB) |  |
| 6 | QPS - QPS |  |
| 14 | SEV - Electrosuisse div. Testing and Certification |  |
| 14 | SIM - Safety in Mines Testing and Research Station (Simtars) |  |
| 1 | SIQ - Slovenian Institute of Quality and Metrology (SIQ) |  |
| 348 | SIR - SIRA Certification Service |  |
| 3 | SP - SP Technical Research Institute of Sweden |  |
| 1 | TPS - TÜV SÜD Product Service GmbH |  |
| 1 | TRC - TRaC EMC & Safety Ltd |  |
| 35 | TRC - TRaC Global Ltd. |  |
1 | | GB/TRC/ExTR12.0024/00 | ESI Technology, Sensor House, ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0019/00 | Longvale Ltd., Lancaster Park,... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0015/00 | Synatel Instrumentation Ltd., ... | IEC 61241-0 (Ed.1) +... |  |
1 | | GB/TRC/ExTR12.0013/00 | JCE (Europe) Ltd., East Way, L... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0012/00 | JCE (Europe) Ltd., East Way, ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0010/00 | Online Electronics Ltd., Onlin... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0009/00 | SpectraLink, Langmarksvej 34, ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0008/01 | JCE Group, East Way, Lee Mill... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0008/00 | JCE Group, East Way, Lee Mill... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0007/01 | JCE (Europe) Ltd., East Way, ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0007/00 | JCE (Europe) Ltd., East Way, ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0006/00 | Pelican Products Inc., 23215 E... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR12.0005/01 | JCE Group East Way Lee Mill In... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0005/00 | JCE Group East Way Lee Mill In... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0004/01 | Ziztel Ltd., Unit 4, Winking H... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0004/00 | Ziztel Ltd., Unit 4, Winking H... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0002/01 | JCE (Europe) Ltd., East Way, ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0002/00 | JCE (Europe) Ltd., East Way, ... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR12.0001/00 | Avtron Industrial Automation, ... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0011/00 | Pelican Products Inc 23215 Ear... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0009/00 | Michell Instruments Ltd., Unit... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR11.0008/01 | Cobham Tactical Communications... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR11.0008/00 | Cobham Surveillance Limited, T... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0007/00 | Pharos Marine Limited Steyning... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0006/00 | Wavetrend Europe Ltd., Parksho... | IEC 60079-0 (Ed.4.0) +... |  |
1 | | GB/TRC/ExTR11.0004/00 | TouchStar Technologies Ltd 7 C... | IEC 60079-0 (Ed.6.0) +... |  |
1 | | GB/TRC/ExTR11.0002/03 | Rockwell Automation / Allen-Br... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0002/02 | Rockwell Automation / Allen-Br... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0001/04 | Brüel & Kjaer Vibro GmbH, Leyd... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0001/03 | Brüel & Kjaer Vibro GmbH, Leyd... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR11.0001/02 | Brüel & Kjaer Vibro GmbH, Leyd... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR10.0006/04 | SKF (UK) Ltd Condition Monitor... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR10.0006/03 | SKF (UK) Ltd Condition Monitor... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR10.0006/02 | SKF (UK) Ltd Condition Monitor... | IEC 60079-0 (Ed.5) +... |  |
1 | | GB/TRC/ExTR10.0005/01 | Circor Instrumentation Technol... | IEC 60079-0 (Ed.4.0) +... |  |
| 49 | TSA - TestSafe Australia |  |
| 49 | TUN - TÜV NORD CERT GmbH |  |
| 24 | TUR - TUV Rheinland Industrie Service GmbH |  |
| 129 | UL - UL LLC |  |
| 1 | UL - Underwriters Laboratories Inc (UL) |  |
| 22 | ULD - UL International DEMKO A/S |  |
| 18 | VTT - VTT Expert Services Ltd. |  |
| 16 | ZLM - ZELM Explosionsschutz GmbH |  |
| 2335 | |  |