Phone numbers in Rio Grande, Puerto Rico
Rio Grande has 11 phone prefixes in area codes 787, 939.
Biggest holders: MetroPCS (T-Mobile), Puerto Rico Tel, Optivon Telecommunications Services. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 55%
- Local phone company 27%
- Internet / business phone carrier 9%
- Phone company 9%
Every prefix in Rio Grande
Search the first six digits of a number in this list. If it's here, the number started in Rio Grande with the carrier shown. If it isn't, check the Puerto Rico page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 787-334 | Optivon Telecommunications Services | Phone company | – |
| 787-500 | T-Mobile (including Sprint) | Mobile carrier | 2007 |
| 787-550 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 787-564 | MetroPCS (T-Mobile) | Mobile carrier | 2002 |
| 787-657 | Liberty Mobile Puerto Rico | Mobile carrier | – |
| 787-668 | MetroPCS (T-Mobile) | Mobile carrier | 2004 |
| 787-809 | Puerto Rico Tel | Local phone company | – |
| 787-887 | Puerto Rico Tel | Local phone company | – |
| 787-888 | Puerto Rico Tel | Local phone company | – |
| 939-303 | Neutral Tandem | Internet / business phone carrier | – |
| 939-492 | MetroPCS (T-Mobile) | Mobile carrier | 2014 |
Most prefixes are pooled: the 10,000 numbers in each are handed out in blocks of 1,000 to different carriers, and people can also take their numbers to another carrier. So the carrier shown is where the prefix started, not a guarantee about any one number. Source: NANPA central office code records, 2026-10-10.