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
2018-02-15 939-499-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-15 939-499-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-13 939-716-7XXX 7000–7999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2018-02-13 939-716-8XXX 8000–8999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2018-02-13 939-716-9XXX 9000–9999Assigned LIBERTY MOBILE PUERTO RICO INC. 639J CAGUAS PR
2018-02-12 939-490-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-490-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-491-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-493-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-494-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-496-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-496-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-496-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-496-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2018-02-12 939-496-4XXX 4000–4999Assigned 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.