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
2021-10-01 939-340-7XXX 7000–7999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-10-01 939-340-8XXX 8000–8999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-10-01 939-340-9XXX 9000–9999Assigned PUERTO RICO TELCO DBA CLARO PUERTO RICO 4823 BAYAMONNOR PR
2021-09-17 939-891-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 FAJARDO PR
2021-09-17 939-891-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 FAJARDO PR
2021-09-17 939-891-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 FAJARDO PR
2021-09-17 939-891-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 FAJARDO PR
2021-09-16 939-835-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-09-16 939-835-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-09-16 939-835-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-09-16 939-835-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-09-16 939-835-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-09-16 939-835-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 PONCE PR
2021-09-15 939-321-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2021-09-15 939-321-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2021-09-15 939-321-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2021-09-15 939-321-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2021-09-15 939-321-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2021-09-15 939-363-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2021-09-15 939-363-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2021-09-15 939-363-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2021-09-15 939-363-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2021-09-15 939-408-0XXX 0000–0999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-15 939-408-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-15 939-408-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-15 939-408-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-15 939-408-9XXX 9000–9999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-14 939-344-1XXX 1000–1999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2021-09-14 939-344-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2021-09-14 939-344-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2021-09-14 939-344-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2021-09-14 939-344-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2021-09-14 939-344-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 SAN GERMAN PR
2021-09-14 939-409-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2021-09-14 939-409-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2021-09-14 939-409-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2021-09-14 939-409-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2021-09-14 939-409-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 NARANJITO PR
2021-09-13 939-317-2XXX 2000–2999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-13 939-317-3XXX 3000–3999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-13 939-317-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-13 939-317-5XXX 5000–5999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-13 939-317-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-13 939-317-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-13 939-317-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 CAROLINA PR
2021-09-13 939-355-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2021-09-13 939-355-8XXX 8000–8999Assigned SUNCOM DBA T-MOBILE USA 8645 BAYAMONNOR PR
2021-09-13 939-459-4XXX 4000–4999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2021-09-13 939-459-7XXX 7000–7999Assigned SUNCOM DBA T-MOBILE USA 8645 MANATI PR
2021-09-13 939-625-6XXX 6000–6999Assigned SUNCOM DBA T-MOBILE USA 8645 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.