Phone numbers in Cayey, Puerto Rico
Cayey has 16 phone prefixes in area codes 787, 939.
Biggest holders: T-Mobile (including Sprint), Puerto Rico Tel, Claro Puerto Rico. This is the local calling area (rate center) where those prefixes were first assigned.
- Mobile carrier 69%
- Local phone company 19%
- Phone company 12%
Every prefix in Cayey
Search the first six digits of a number in this list. If it's here, the number started in Cayey with the carrier shown. If it isn't, check the Puerto Rico page or look the number up.
| Prefix | Carrier | Type | Assigned |
|---|---|---|---|
| 787-205 | Claro Puerto Rico | Local phone company | – |
| 787-263 | Puerto Rico Tel | Local phone company | – |
| 787-490 | Optivon Telecommunications Services | Phone company | – |
| 787-535 | Liberty Mobile Puerto Rico | Mobile carrier | – |
| 787-557 | MetroPCS (T-Mobile) | Mobile carrier | 2001 |
| 787-595 | T-Mobile (including Sprint) | Mobile carrier | 2004 |
| 787-678 | T-Mobile (including Sprint) | Mobile carrier | 2005 |
| 787-694 | Worldnet Telecommunications | Phone company | 2007 |
| 787-738 | Puerto Rico Tel | Local phone company | – |
| 939-213 | T-Mobile (including Sprint) | Mobile carrier | 2016 |
| 939-316 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 939-325 | T-Mobile (including Sprint) | Mobile carrier | 2008 |
| 939-362 | T-Mobile (including Sprint) | Mobile carrier | 2021 |
| 939-377 | T-Mobile (including Sprint) | Mobile carrier | 2022 |
| 939-419 | T-Mobile (including Sprint) | Mobile carrier | 2017 |
| 939-478 | T-Mobile (including Sprint) | Mobile carrier | 2018 |
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.