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
2021-02-11 939-407-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-407-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-407-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-407-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-407-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-407-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-02-11 939-759-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2021-01-27 939-234-0XXX 0000–0999Assigned LIBERTY MOBILE PUERTO RICO INC. 8305 CANOVANAS PR
2021-01-21 939-399-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J RIOPIEDRAS PR
2020-12-16 939-749-7XXX 7000–7999Assigned NEUTRAL TANDEM - PR 559F COAMO PR
2020-12-16 939-759-7XXX 7000–7999Assigned NEUTRAL TANDEM - PR 559F SANTURCE PR
2020-12-16 939-779-7XXX 7000–7999Assigned NEUTRAL TANDEM - PR 559F VILLALBA PR
2020-12-16 939-839-7XXX 7000–7999Assigned NEUTRAL TANDEM - PR 559F YABUCOA PR
2020-12-15 939-359-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F MOCA PR
2020-12-15 939-569-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F OROCOVIS PR
2020-12-15 939-629-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F SANTANA PR
2020-12-15 939-814-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F UTUADO PR
2020-12-15 939-915-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F VEGA ALTA PR
2020-12-14 939-369-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F AGUADA PR
2020-12-14 939-739-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F TOA ALTA PR
2020-12-11 939-220-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F HUMACAO PR
2020-12-11 939-221-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F LUQUILLO PR
2020-12-11 939-234-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F CANOVANAS PR
2020-12-11 939-236-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F RIOPIEDRAS PR
2020-12-11 939-294-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F ARROYO PR
2020-12-11 939-296-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F JUNCOS PR
2020-12-11 939-300-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F SANLORENZO PR
2020-12-11 939-303-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F RIO GRANDE PR
2020-12-11 939-444-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F ROOSEVLTRD PR
2020-12-11 939-445-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F GUANICA PR
2020-12-11 939-465-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F NAGUABO PR
2020-12-11 939-687-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F GURABO PR
2020-12-11 939-715-7XXX 7000–7999Assigned NEUTRAL TANDEM - PR 559F CAGUAS PR
2020-12-11 939-800-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F ADJUNTAS PR
2020-12-11 939-845-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F CAROLINA PR
2020-12-11 939-888-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F LASPIEDRAS PR
2020-12-11 939-900-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F PONCE PR
2020-12-11 939-928-2XXX 2000–2999Assigned NEUTRAL TANDEM - PR 559F PENUELAS PR
2020-12-11 939-992-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F YAUCO PR
2020-12-11 939-999-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F AGUASBUNAS PR
2020-12-10 939-230-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F ANASCO PR
2020-12-10 939-291-2XXX 2000–2999Assigned NEUTRAL TANDEM - PR 559F QUEBRADLLS 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.