NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/20/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

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
SUNCOM DBA T-MOBILE USA 655
LIBERTY MOBILE PUERTO RICO INC. 329
LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 165
WORLDNET TELECOMMUNICATIONS, INC. - PR 106
NEUTRAL TANDEM - PR 63
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-04-26 787-558-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SAN ISABEL PR
2021-04-26 787-592-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYAMA PR
2020-12-15 787-230-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F TOA BAJA PR
2020-12-15 787-965-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F VEGA BAJA PR
2020-12-11 787-434-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F CIDRA PR
2020-12-11 787-482-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F SALINAS PR
2020-12-11 787-507-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F GUAYNABO PR
2020-12-11 787-558-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F SAN ISABEL PR
2020-12-11 787-853-7XXX 7000–7999Assigned NEUTRAL TANDEM - PR 559F AGUIRRE PR
2020-12-11 787-913-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F JUANA DIAZ PR
2020-12-11 787-952-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F CULEBRA PR
2020-12-11 787-968-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F VIEQUES PR
2020-12-11 787-973-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F GUAYANILLA PR
2020-12-11 787-985-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F ISLA VERDE PR
2020-12-11 787-991-9XXX 9000–9999Assigned NEUTRAL TANDEM - PR 559F AIBONITO PR
2020-12-10 787-437-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F JAYUYA PR
2020-12-10 787-476-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F SAN GERMAN PR
2020-12-10 787-663-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F CIALES PR
2020-12-10 787-665-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F DORADO PR
2020-12-10 787-699-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F BARRANQUTS PR
2020-12-10 787-802-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F COROZAL PR
2020-12-10 787-822-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F FLORIDA PR
2020-12-10 787-936-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F CATANO PR
2020-12-10 787-956-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F LARES PR
2020-12-10 787-978-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F SABANAGRND PR
2020-11-27 787-483-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-11-27 787-483-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-11-27 787-483-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-11-27 787-483-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-11-27 787-483-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-09-01 787-230-6XXX 6000–6999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G TOA BAJA PR
2020-09-01 787-437-4XXX 4000–4999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G JAYUYA PR
2020-09-01 787-482-4XXX 4000–4999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G SALINAS PR
2020-09-01 787-592-1XXX 1000–1999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G GUAYAMA PR
2020-09-01 787-694-3XXX 3000–3999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G CAYEY PR
2020-09-01 787-818-7XXX 7000–7999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G MOCA PR
2020-09-01 787-827-9XXX 9000–9999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G LAS MARIAS PR
2020-09-01 787-913-9XXX 9000–9999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G JUANA DIAZ PR
2020-09-01 787-973-5XXX 5000–5999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G GUAYANILLA PR
2020-02-13 787-230-9XXX 9000–9999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J TOA BAJA PR
2020-02-13 787-425-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYNABO PR
2020-02-13 787-434-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J CIDRA PR
2020-02-13 787-468-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J FAJARDO PR
2020-02-13 787-476-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SAN GERMAN PR
2020-02-13 787-482-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SALINAS PR
2020-02-13 787-483-6XXX 6000–6999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J NARANJITO PR
2020-02-13 787-558-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SAN ISABEL PR
2020-02-13 787-589-4XXX 4000–4999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J AGUADA PR
2020-02-13 787-592-8XXX 8000–8999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYAMA PR
2020-02-13 787-606-5XXX 5000–5999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J GUAYANILLA 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.