| OB No. | | Position on | Rec. |
|---|
| 991 | List of ITU-T Recommendation E.164 assigned country codes | 2011-11-01 | E.164 |
| 976 | List of Data Country or Geographical Area Codes | 2011-03-15 | X.121 |
| 972 | List of terrestrial trunk radio mobile country codes | 2011-01-15 | E.218 |
| 669 | Five-letter Code Groups for the use of the International Public Telegram Service | 1998-06-01 | F.1 |
| 1028 | List of Signalling Area/Network Codes (SANC) | 2013-05-15 | Q.708 |
| 1002 | List of Country or Geographical Area Codes for non standard facilities in telematic services | 2012-04-15 | T.35 |
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