NumberResearchRecent prefix assignments
0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/21/2026
The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.
| Assigned | NPA-NXX | Thousands-blocks taken (last-4 opening) | Code holder | OCN | Rate center | State |
|---|---|---|---|---|---|---|
| 2004-06-15 | 787-676 | 0–9 XXXall 10 · 2 holders which blocks → | METROPCS, INC. | 5562 | HUMACAO | PR |
| 2004-01-28 | 787-668 | 0XXX2XXX3XXX5XXX6XXX7XXX8XXX9XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | RIO GRANDE | PR |
| 2003-02-18 | 787-559 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HUMACAO | PR |
| 2002-10-31 | 787-586 | none assigned yet which blocks → | METROPCS, INC. | 5562 | CAGUAS | PR |
| 2002-10-23 | 787-564 | none assigned yet which blocks → | METROPCS, INC. | 5562 | RIO GRANDE | PR |
| 2002-10-18 | 787-298 | none assigned yet which blocks → | METROPCS, INC. | 5562 | PONCE | PR |
| 2001-09-12 | 787-543 | 0XXX4XXX · 2 holders which blocks → | METROPCS, INC. | 5562 | GUAYANILLA | PR |
| 2001-09-12 | 787-557 | 0XXX4XXX5XXX which blocks → | METROPCS, INC. | 5562 | CAYEY | PR |
| 2001-08-07 | 787-431 | none assigned yet which blocks → | METROPCS, INC. | 5562 | AGUADILLA | PR |
| 2001-08-07 | 787-538 | 5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | SAN GERMAN | PR |
| 2001-07-09 | 787-550 | none assigned yet which blocks → | METROPCS, INC. | 5562 | RIO GRANDE | PR |
| 2001-06-20 | 787-345 | 0XXX2XXX3XXX4XXX5XXX · 3 holders which blocks → | METROPCS, INC. | 5562 | VEGA BAJA | PR |
| 2001-06-20 | 787-444 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTURCE | PR |
| 2001-06-20 | 787-914 | none assigned yet which blocks → | METROPCS, INC. | 5562 | HUMACAO | PR |
| 2001-05-18 | 787-435 | 5XXX7XXX8XXX which blocks → | METROPCS, INC. | 5562 | FAJARDO | PR |
| 2001-03-16 | 787-356 | none assigned yet which blocks → | METROPCS, INC. | 5562 | ARECIBO | PR |
| 2001-03-16 | 787-432 | none assigned yet which blocks → | METROPCS, INC. | 5562 | PONCE | PR |
| 2001-02-12 | 787-469 | none assigned yet which blocks → | METROPCS, INC. | 5562 | CAGUAS | PR |
| 2001-01-15 | 787-358 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTURCE | PR |
| 2001-01-11 | 787-297 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTURCE | PR |
| — | 787-295 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTURCE | PR |
| — | 787-347 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTURCE | PR |
| — | 787-348 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTURCE | PR |
| — | 787-364 | none assigned yet which blocks → | METROPCS, INC. | 5562 | SANTURCE | PR |
| — | 787-906 | 0–9 XXXall 10 · 3 holders which blocks → | METROPCS, INC. | 5562 | BAYAMONNOR | PR |
Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.