NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 314
T-MOBILE USA, INC. 729
NEW CINGULAR WIRELESS PCS, LLC - IL 581
ONVOY, LLC - MO 511
BANDWIDTH.COM CLEC, LLC - MO 360
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 204
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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-11-18 314-299-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-299-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-18 314-357-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-15 314-459-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-334-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 OAKVILLE MO
2011-11-10 314-785-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-785-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-785-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-10 314-792-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-11-04 314-270-9XXX 9000–9999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SAPPINGTON MO
2011-11-03 314-492-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 ST LOUIS MO
2011-11-02 314-801-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MO 7432 LADUE MO
2011-11-02 314-817-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J LADUE MO
2011-10-28 314-296-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ST LOUIS MO
2011-10-20 314-594-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C CREVECOEUR MO
2011-10-06 314-442-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-442-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-442-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-475-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-475-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-593-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-656-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-683-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-684-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-06 314-684-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2011-10-04 314-296-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
2011-09-15 314-400-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - MO 993E LADUE MO

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.