NumberResearchThousands-blocks in 787-921
This prefix’s ten 1,000-number blocks and who holds each — 10 on record · from the daily NANPA thousands-block report, 09/20/2026
The ten 1,000-number thousand-blocks inside prefix 787-921 and who was initially assigned each. Under pooling these blocks often belong to different carriers — the single prefix-level “assignee” is usually just the pool / code holder, not who holds the numbers. ← all 787 blocks
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 |
|---|---|---|---|---|---|---|---|
| 2023-01-11 | 787-921-0XXX | 0000–0999 | Assigned | TELNYX LLC | 073H | MANATI | PR |
| 2019-03-28 | 787-921-1XXX | 1000–1999 | Assigned | NATURAL G.C. INC. - PR | 985G | MANATI | PR |
| — | 787-921-2XXX | 2000–2999 | Available | MANATI | PR | ||
| 2021-05-10 | 787-921-3XXX | 3000–3999 | Assigned | NEUTRAL TANDEM - PR | 559F | MANATI | PR |
| 2020-02-13 | 787-921-4XXX | 4000–4999 | Assigned | LUMEN TECHNOLOGIES PUERTO RICO, LLC | 091J | MANATI | PR |
| 2015-12-22 | 787-921-5XXX | 5000–5999 | Assigned | LIBERTY COMMUNICATIONS OF PUERTO RICO LLC | 955G | MANATI | PR |
| 2017-04-03 | 787-921-6XXX | 6000–6999 | Assigned | LIBERTY COMMUNICATIONS OF PUERTO RICO LLC | 955G | MANATI | PR |
| 2007-05-15 | 787-921-7XXX | 7000–7999 | Assigned | WORLDNET TELECOMMUNICATIONS, INC. - PR | 9726 | MANATI | PR |
| 2021-09-13 | 787-921-8XXX | 8000–8999 | Assigned | SUNCOM DBA T-MOBILE USA | 8645 | MANATI | PR |
| 2008-05-08 | 787-921-9XXX | 9000–9999 | Assigned | PUERTO RICO TELEPHONE COMPANY, INC. | 667C | MANATI | 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.