NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

3 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, last 30 days — NPA 939
METROPCS, INC. 3
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
2020-12-10 939-298-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F RAMEY PR
2020-12-10 939-345-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F MOROVIS PR
2020-12-10 939-357-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F CABO ROJO PR
2020-12-10 939-394-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F LAS MARIAS PR
2020-12-10 939-406-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F AGUADILLA PR
2020-12-10 939-407-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-10 939-407-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-10 939-407-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-10 939-407-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-10 939-409-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F NARANJITO PR
2020-12-10 939-544-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F CAMUY PR
2020-12-10 939-609-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F ISABELA PR
2020-12-10 939-649-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F ARECIBO PR
2020-12-10 939-666-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F SANSBSTIAN PR
2020-12-10 939-699-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F RINCON PR
2020-12-10 939-910-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F MARICAO PR
2020-12-10 939-935-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F HORMIGUERO PR
2020-12-10 939-985-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F COMERIO PR
2020-12-07 939-395-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-07 939-395-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-07 939-395-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-07 939-395-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-07 939-395-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-07 939-395-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2020-12-07 939-652-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-652-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-07 939-845-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2020-12-04 939-313-2XXX 2000–2999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J BAYAMONSUR PR
2020-12-04 939-610-0XXX 0000–0999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J BAYAMONSUR PR
2020-12-01 939-406-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-12-01 939-409-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-12-01 939-409-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-12-01 939-409-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-12-01 939-409-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2020-11-27 939-200-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-11-27 939-200-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-11-27 939-200-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-11-27 939-200-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-11-27 939-200-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-11-27 939-200-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-11-27 939-200-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 AGUADILLA PR
2020-11-04 939-600-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F PUEBLOVIEJ PR
2020-11-04 939-610-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F BAYAMONSUR 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.