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
2021-07-06 939-229-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F SANTURCEES PR
2021-07-06 939-233-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F FAJARDO PR
2021-07-06 939-233-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F FAJARDO PR
2021-07-06 939-393-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F BARCELONTA PR
2021-07-06 939-393-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F BARCELONTA PR
2021-07-06 939-412-2XXX 2000–2999Assigned NEUTRAL TANDEM - PR 559F LEVITTOWN PR
2021-07-06 939-412-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F LEVITTOWN PR
2021-07-06 939-459-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F MANATI PR
2021-07-06 939-459-6XXX 6000–6999Assigned NEUTRAL TANDEM - PR 559F MANATI PR
2021-07-06 939-478-2XXX 2000–2999Assigned NEUTRAL TANDEM - PR 559F CAYEY PR
2021-07-06 939-478-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F CAYEY PR
2021-07-06 939-606-3XXX 3000–3999Assigned NEUTRAL TANDEM - PR 559F MAYAGUEZ PR
2021-07-06 939-606-4XXX 4000–4999Assigned NEUTRAL TANDEM - PR 559F MAYAGUEZ PR
2021-07-06 939-808-7XXX 7000–7999Assigned NEUTRAL TANDEM - PR 559F TRUJILLOAL PR
2021-07-06 939-808-8XXX 8000–8999Assigned NEUTRAL TANDEM - PR 559F TRUJILLOAL PR
2021-06-29 939-317-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-29 939-317-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-29 939-317-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 939-655-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 939-845-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 939-845-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 939-845-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 939-845-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 939-845-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-28 939-845-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-06-23 939-318-2XXX 2000–2999Assigned LUMEN TECHNOLOGIES PUERTO RICO, LLC 091J SANTURCE PR
2021-06-17 939-369-9XXX 9000–9999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G AGUADA PR
2021-06-17 939-444-5XXX 5000–5999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G ROOSEVLTRD PR
2021-06-17 939-666-0XXX 0000–0999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G SANSBSTIAN PR
2021-06-17 939-749-0XXX 0000–0999Assigned LIBERTY COMMUNICATIONS OF PUERTO RICO LLC 955G COAMO PR
2021-05-09 939-441-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-05-09 939-900-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-05-09 939-900-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-05-09 939-900-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-05-09 939-900-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-05-09 939-900-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-05-09 939-900-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-05-09 939-900-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-04-15 939-333-1XXX 1000–1999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J PUEBLOVIEJ PR
2021-04-06 939-315-0XXX 0000–0999Assigned TELNYX LLC 073H RIOPIEDRAS PR
2021-03-25 939-306-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-03-25 939-306-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR 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.