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
2011-02-23 939-404-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-404-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-404-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-404-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-23 939-405-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2011-02-14 939-397-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2011-02-14 939-397-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2011-02-03 939-292-8XXX 8000–8999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J LEVITTOWN PR
2011-02-03 939-292-9XXX 9000–9999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J LEVITTOWN PR
2011-01-27 939-202-8XXX 8000–8999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J LEVITTOWN PR
2011-01-27 939-202-9XXX 9000–9999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J LEVITTOWN PR
2010-12-30 939-284-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-30 939-284-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-277-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2010-12-23 939-281-9XXX 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.