| OB No. | | Position on | Rec. |
|---|
| 1028 | List of Signalling Area/Network Codes (SANC) | 15/05/2013 | Q.708 |
| 1027 | Legal Time 2013 | 01/05/2013 | LT |
| 1019 | Mobile Network Codes (MNC) for the international identification plan for public networks and subscriptions (According to Recommendation ITU-T E.212 (05/2008)) | 01/01/2013 | E.212 |
| 1015 | List of Access codes/numbers for mobile networks | 01/11/2012 | E.164 |
| 1011 | List of issuer identifier numbers for the international telecommunication charge card (In accordance with Recommendation ITU-T E.118 (05/2006)) | 01/09/2012 | E.118 |
| 1005 | List of Mobile Country or Geographical Area Codes | 01/06/2012 | E.212 |
| 1004 | List of International Signalling Point Codes (ISPC) (According to ITU-T Recommendation Q.708 (03/99)) | 15/05/2012 | Q.708 |
| 1002 | List of Country or Geographical Area Codes for non standard facilities in telematic services | 15/04/2012 | T.35 |
| 1001 | List of the national authorities designated to assign ITU-T Recommendation T.35 terminal provider codes | 01/04/2012 | T.35 |
| 1000 | Service restrictions | 15/03/2012 | |
| 994 | Dialling procedures (international prefix, national (trunk) prefix and national (significant) number) (in accordance with ITU-T Recommendation E.164 (11/2010)) | 15/12/2011 | E.164 |
| 991 | List of ITU-T Recommendation E.164 assigned country codes | 01/11/2011 | E.164 |
| 991 | Call-Back and alternative calling procedures (Res. 21 Rev. PP-2006) | 01/11/2011 | Call-Back(2011) |
| 981 | List of ITU carrier codes (According to ITU-T Recommendation M.1400 (07/2006)) | 01/06/2011 | |
| 980 | List of telegram destination indicators | 15/05/2011 | F.32 |
| 978 | List of Telex Destination Codes (TDC) and Telex Network Identification Codes (TNIC) | 15/04/2011 | F.68 / F.69 |
| 977 | List of Data Network Identification Codes (DNIC) | 01/04/2011 | X.121 |
| 976 | List of Data Country or Geographical Area Codes | 15/03/2011 | X.121 |
| 974 | List of Names of Administration Management Domains (ADMD) | 15/02/2011 | F.400 / X.400 |
| 972 | List of terrestrial trunk radio mobile country codes | 15/01/2011 | E.218 |
| 968 | Status of Radiocommunications between Amateur Stations of different Countries (In accordance with optional provision No. 25.1 of the Radio Regulations) and Form of Call Signs assigned by each Administration to its Amateur and Experimental Stations | 15/11/2010 | RR 25.1 |
| 955 | Various tones used in national networks (According to ITU-T Recommendation E.180) (03/1998) | 01/05/2010 | E.180 |
| 669 | Five-letter Code Groups for the use of the International Public Telegram Service | 01/06/1998 | F.1 |