NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/21/2026
Most carrier growth happens here, not at the prefix level: under number pooling, carriers receive individual 1,000-number blocks (e.g. 626-470-0XXX) within already-assigned prefixes. Assignments are initial assignments — the current serving carrier of individual numbers may differ due to portability.
Most active assignees, all time — NPA 787
New assignments by month
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| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2010-10-26 | 787-944-0XXX | 0000–0999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-944-1XXX | 1000–1999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-944-2XXX | 2000–2999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-944-7XXX | 7000–7999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-944-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-963-2XXX | 2000–2999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-963-3XXX | 3000–3999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-963-4XXX | 4000–4999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-963-5XXX | 5000–5999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-963-7XXX | 7000–7999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-963-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-972-0XXX | 0000–0999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-972-3XXX | 3000–3999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-26 | 787-972-5XXX | 5000–5999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2010-10-14 | 787-945-5XXX | 5000–5999 | Assigned | WORLDNET TELECOMMUNICATIONS, INC. - PR | 9726 | SANTURCEES | PR |
| 2010-09-14 | 787-777-1XXX | 1000–1999 | Assigned | WORLDNET TELECOMMUNICATIONS, INC. - PR | 9726 | RIOPIEDRAS | PR |
| 2010-09-14 | 787-961-9XXX | 9000–9999 | Assigned | WORLDNET TELECOMMUNICATIONS, INC. - PR | 9726 | CAGUAS | PR |
| 2010-09-10 | 787-600-2XXX | 2000–2999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | PUEBLOVIEJ | PR |
| 2010-09-10 | 787-600-3XXX | 3000–3999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | PUEBLOVIEJ | PR |
| 2010-09-10 | 787-600-4XXX | 4000–4999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | PUEBLOVIEJ | PR |
| 2010-09-10 | 787-600-5XXX | 5000–5999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | PUEBLOVIEJ | PR |
| 2010-07-13 | 787-900-2XXX | 2000–2999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | CAGUAS | PR |
| 2010-07-13 | 787-900-3XXX | 3000–3999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | CAGUAS | PR |
| 2010-07-13 | 787-900-4XXX | 4000–4999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | CAGUAS | PR |
| 2010-07-13 | 787-900-5XXX | 5000–5999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | CAGUAS | PR |
| 2010-06-07 | 787-600-0XXX | 0000–0999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | PUEBLOVIEJ | PR |
| 2010-06-07 | 787-600-1XXX | 1000–1999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | PUEBLOVIEJ | PR |
| 2010-06-07 | 787-710-5XXX | 5000–5999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | CAROLINA | PR |
| 2010-06-07 | 787-710-6XXX | 6000–6999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 639J | CAROLINA | PR |
| 2009-12-23 | 787-900-0XXX | 0000–0999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 8305 | CAGUAS | PR |
| 2009-12-23 | 787-900-1XXX | 1000–1999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 8305 | CAGUAS | PR |
| 2009-12-23 | 787-961-0XXX | 0000–0999 | Assigned | LIBERTY COMMUNICATIONS OF PUERTO RICO LLC | 955G | CAGUAS | PR |
| 2009-12-23 | 787-961-1XXX | 1000–1999 | Assigned | LIBERTY MOBILE PUERTO RICO INC. | 8305 | CAGUAS | PR |
| 2009-12-23 | 787-961-8XXX | 8000–8999 | Assigned | LIBERTY COMMUNICATIONS OF PUERTO RICO LLC | 955G | CAGUAS | PR |
| 2009-12-10 | 787-702-4XXX | 4000–4999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | NARANJITO | PR |
| 2009-12-07 | 787-296-9XXX | 9000–9999 | Assigned | WORLDNET TELECOMMUNICATIONS, INC. - PR | 9726 | RIOPIEDRAS | PR |
| 2009-11-17 | 787-669-7XXX | 7000–7999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | ARECIBO | PR |
| 2009-11-17 | 787-669-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | ARECIBO | PR |
| 2009-10-23 | 787-669-6XXX | 6000–6999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | ARECIBO | PR |
| 2009-09-22 | 787-513-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | CAROLINA | PR |
| 2009-09-15 | 787-423-0XXX | 0000–0999 | Assigned | METROPCS, INC. | 5562 | SANTURCE | PR |
| 2009-09-15 | 787-423-1XXX | 1000–1999 | Assigned | METROPCS, INC. | 5562 | SANTURCE | PR |
| 2009-09-15 | 787-423-4XXX | 4000–4999 | Assigned | METROPCS, INC. | 5562 | SANTURCE | PR |
| 2009-09-15 | 787-423-5XXX | 5000–5999 | Assigned | METROPCS, INC. | 5562 | SANTURCE | PR |
| 2009-09-15 | 787-423-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SANTURCE | PR |
| 2009-09-15 | 787-470-0XXX | 0000–0999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2009-09-15 | 787-470-1XXX | 1000–1999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2009-09-15 | 787-470-2XXX | 2000–2999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2009-09-15 | 787-470-3XXX | 3000–3999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
| 2009-09-15 | 787-470-5XXX | 5000–5999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SANTURCE | PR |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/21/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.