| OB No. | | Position on | Rec. |
|---|
| 1293 | List of Signalling Area/Network Codes (SANC) | nulldate | Q.708 |
| 1117 | List of Mobile Country or Geographical Area Codes | 2017-02-01 | E.212 |
| 1114 | List of Recommendation ITU-T E.164 assigned country codes | 2016-12-15 | E.164 |
| 1002 | List of Country or Geographical Area Codes for non standard facilities in telematic services | 2012-04-15 | T.35 |
| 976 | List of Data Country or Geographical Area Codes | 2011-03-15 | X.121 |
| 669 | Five-letter Code Groups for the use of the International Public Telegram Service | 1998-06-01 | F.1 |