PARIS CODES
| Code | Name | Remarks |
| 023 | OBErkampf | |
| 027 | OBServatoire | |
| 033 | ODEon | |
| 073 | OPEra | |
| 076 | ORNano | |
| 204 | BOIleau | |
| 205 | BOLivar | |
| 206 | COMbat | |
| 207 | BOSsuet, COPernic | COPernic listed in 1949, 1953, not 1955. BOSsuet due to open 1963. |
| 208 | BOTzaris | |
| 222 | BABylone | See note below. |
| 224 | BAGatelle | |
| 225 | BALzac | |
| 227 | CARnot | First exchange in Paris to be converted to automatic working, 22.9.1928 (see note below). |
| 228 | BAtignolles | |
| 235 | BELle-Epine | |
| 236 | CENtral | |
| 237 | BERny | |
| 242 | CHArlebourg | |
| 243 | CHEnier | Due to open 1963. |
| 250 | BLOmet | |
| 253 | ALEsia | |
| 254 | CLIgnancourt | |
| 256 | ALMa | |
| 265 | ANJou | |
| 270 | BROssolette | |
| 272 | ARChives | |
| 273 | BREteuil (listed 1963), BREtagne (1965) | |
| 274 | ARGenteuil | Listed 1951 and 1957. |
| 283 | BUFfon | Due to open 1961. |
| 284 | AVIation | |
| 287 | AVRon | |
| 288 | AUTeuil |
- BOSsuet, CHÉNier and GOUnod exchanges opened in 1964 after the changeover to all-figure numbers, although some subscribers had already printed letter headings and other material with their new number in letter-code form.
- Names shown in italics indicate exchanges outside Paris proper (la banlieue parisenne, Zone Péripherique). Some exchanges served both city and suburbs.
- Codes and exchange names shown 'listed' in a certain year refer to the official telephone directory of that year.
BABylone. This exchange opened some time between 1947 and 1949. In a US military telephone directory dated May 1946 the code BAC is included.
CARnot. Being the first dial office, CARnot was cut over in phases, over several weeks. It may also have been the first exchange where call director equipment was used on a large rotary exchange.