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
2007-10-16 939-244-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-10-16 939-244-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-242-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-0XXX 0000–0999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-1XXX 1000–1999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-2XXX 2000–2999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-3XXX 3000–3999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-4XXX 4000–4999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-5XXX 5000–5999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-6XXX 6000–6999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-14 939-243-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2007-09-05 939-201-3XXX 3000–3999Assigned WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 ADJUNTAS PR
2007-09-05 939-307-8XXX 8000–8999Assigned WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 ARROYO PR
2007-09-05 939-697-6XXX 6000–6999Assigned WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 RINCON PR
2007-06-14 939-212-3XXX 3000–3999Assigned WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 OROCOVIS PR
2007-05-30 939-731-4XXX 4000–4999Assigned WORLDNET TELECOMMUNICATIONS, INC. - PR 9726 VILLALBA PR
2006-10-25 939-475-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2006-10-25 939-475-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2006-10-25 939-475-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-12-06 939-475-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-29 939-218-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-29 939-218-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-08 939-218-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-08 939-218-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-08 939-218-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-11-08 939-218-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 SANTURCE PR
2005-03-16 939-205-1XXX 1000–1999Assigned NEUTRAL TANDEM - PR 559F PUEBLOVIEJ PR
2005-03-16 939-205-5XXX 5000–5999Assigned NEUTRAL TANDEM - PR 559F PUEBLOVIEJ 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.