NumberResearchRecent thousands-block assignments
0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026
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
Sep 2026
Aug 2026
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Oct 2025
| Assigned | Thousands-block | Last 4 digits | Status | Assignee | OCN | Rate center | State |
|---|---|---|---|---|---|---|---|
| 2022-10-07 | 787-456-5XXX | 5000–5999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | AGUADILLA | PR |
| 2022-10-07 | 787-456-6XXX | 6000–6999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | AGUADILLA | PR |
| 2022-10-07 | 787-456-7XXX | 7000–7999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | AGUADILLA | PR |
| 2022-10-07 | 787-456-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | AGUADILLA | PR |
| 2022-09-06 | 787-422-1XXX | 1000–1999 | Assigned | NEUTRAL TANDEM - PR | 559F | GUAYNABO | PR |
| 2022-09-06 | 787-422-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | GUAYNABO | PR |
| 2022-09-06 | 787-663-8XXX | 8000–8999 | Assigned | NEUTRAL TANDEM - PR | 559F | CIALES | PR |
| 2022-09-06 | 787-663-9XXX | 9000–9999 | Assigned | NEUTRAL TANDEM - PR | 559F | CIALES | PR |
| 2022-08-24 | 787-395-9XXX | 9000–9999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | BAYAMONNOR | PR |
| 2022-08-24 | 787-538-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | SAN GERMAN | PR |
| 2022-08-24 | 787-666-5XXX | 5000–5999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | BAYAMONNOR | PR |
| 2022-07-05 | 787-421-7XXX | 7000–7999 | Assigned | NEUTRAL TANDEM - PR | 559F | GUAYNABO | PR |
| 2022-07-05 | 787-437-6XXX | 6000–6999 | Assigned | NEUTRAL TANDEM - PR | 559F | JAYUYA | PR |
| 2022-07-05 | 787-476-9XXX | 9000–9999 | Assigned | NEUTRAL TANDEM - PR | 559F | SAN GERMAN | PR |
| 2022-07-05 | 787-482-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | SALINAS | PR |
| 2022-07-05 | 787-558-1XXX | 1000–1999 | Assigned | NEUTRAL TANDEM - PR | 559F | SAN ISABEL | PR |
| 2022-07-05 | 787-592-6XXX | 6000–6999 | Assigned | NEUTRAL TANDEM - PR | 559F | GUAYAMA | PR |
| 2022-05-18 | 787-476-6XXX | 6000–6999 | Assigned | METROPCS, INC. | 5562 | SAN GERMAN | PR |
| 2022-05-13 | 787-990-9XXX | 9000–9999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | CAROLINA | PR |
| 2022-03-02 | 787-965-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | VEGA BAJA | PR |
| 2022-03-02 | 787-965-4XXX | 4000–4999 | Assigned | NEUTRAL TANDEM - PR | 559F | VEGA BAJA | PR |
| 2022-02-14 | 787-456-0XXX | 0000–0999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | AGUADILLA | PR |
| 2022-02-14 | 787-456-9XXX | 9000–9999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | AGUADILLA | PR |
| 2021-11-22 | 787-421-9XXX | 9000–9999 | Assigned | WORLDNET TELECOMMUNICATIONS, INC. - PR | 9726 | GUAYNABO | PR |
| 2021-10-18 | 787-437-5XXX | 5000–5999 | Assigned | NEUTRAL TANDEM - PR | 559F | JAYUYA | PR |
| 2021-09-13 | 787-921-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | MANATI | PR |
| 2021-09-09 | 787-694-5XXX | 5000–5999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | CAYEY | PR |
| 2021-09-09 | 787-694-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | CAYEY | PR |
| 2021-08-06 | 787-476-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | SAN GERMAN | PR |
| 2021-08-06 | 787-476-4XXX | 4000–4999 | Assigned | NEUTRAL TANDEM - PR | 559F | SAN GERMAN | PR |
| 2021-08-06 | 787-794-7XXX | 7000–7999 | Assigned | NEUTRAL TANDEM - PR | 559F | TOA BAJA | PR |
| 2021-07-06 | 787-592-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | GUAYAMA | PR |
| 2021-07-06 | 787-592-4XXX | 4000–4999 | Assigned | NEUTRAL TANDEM - PR | 559F | GUAYAMA | PR |
| 2021-07-06 | 787-665-9XXX | 9000–9999 | Assigned | NEUTRAL TANDEM - PR | 559F | DORADO | PR |
| 2021-07-06 | 787-699-2XXX | 2000–2999 | Assigned | NEUTRAL TANDEM - PR | 559F | BARRANQUTS | PR |
| 2021-07-06 | 787-699-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | BARRANQUTS | PR |
| 2021-07-06 | 787-714-9XXX | 9000–9999 | Assigned | NEUTRAL TANDEM - PR | 559F | CIDRA | PR |
| 2021-06-17 | 787-979-3XXX | 3000–3999 | Assigned | LIBERTY COMMUNICATIONS OF PUERTO RICO LLC | 955G | LEVITTOWN | PR |
| 2021-06-14 | 787-558-8XXX | 8000–8999 | Assigned | LIBERTY COMMUNICATIONS OF PUERTO RICO LLC | 955G | SAN ISABEL | PR |
| 2021-05-10 | 787-293-9XXX | 9000–9999 | Assigned | NEUTRAL TANDEM - PR | 559F | TRUJILLOAL | PR |
| 2021-05-10 | 787-468-6XXX | 6000–6999 | Assigned | NEUTRAL TANDEM - PR | 559F | FAJARDO | PR |
| 2021-05-10 | 787-592-2XXX | 2000–2999 | Assigned | NEUTRAL TANDEM - PR | 559F | GUAYAMA | PR |
| 2021-05-10 | 787-689-9XXX | 9000–9999 | Assigned | NEUTRAL TANDEM - PR | 559F | LEVITTOWN | PR |
| 2021-05-10 | 787-694-4XXX | 4000–4999 | Assigned | NEUTRAL TANDEM - PR | 559F | CAYEY | PR |
| 2021-05-10 | 787-808-6XXX | 6000–6999 | Assigned | NEUTRAL TANDEM - PR | 559F | LAJAS | PR |
| 2021-05-10 | 787-861-8XXX | 8000–8999 | Assigned | NEUTRAL TANDEM - PR | 559F | MAUNABO | PR |
| 2021-05-10 | 787-921-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | MANATI | PR |
| 2021-05-10 | 787-945-6XXX | 6000–6999 | Assigned | NEUTRAL TANDEM - PR | 559F | SANTURCEES | PR |
| 2021-05-10 | 787-970-9XXX | 9000–9999 | Assigned | NEUTRAL TANDEM - PR | 559F | BARCELONTA | PR |
| 2021-05-10 | 787-986-4XXX | 4000–4999 | Assigned | NEUTRAL TANDEM - PR | 559F | MAYAGUEZ | PR |
Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/20/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.