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
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Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2013-09-20 314-728-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-20 314-728-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-20 314-728-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-16 314-326-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-16 314-326-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-16 314-326-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-16 314-665-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-16 314-665-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-09-16 314-817-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2013-09-16 314-817-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LADUE MO
2013-09-06 314-202-8XXX 8000–8999Assigned CHARTER IP ENABLED SERVICES, LLC 792K ST LOUIS MO
2013-09-06 314-270-4XXX 4000–4999Assigned CHARTER IP ENABLED SERVICES, LLC 792K SAPPINGTON MO
2013-08-28 314-665-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
2013-08-28 314-665-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
2013-08-28 314-665-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
2013-08-22 314-278-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 KIRKWOOD MO
2013-08-21 314-297-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-21 314-297-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-21 314-297-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-21 314-297-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-13 314-326-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-13 314-326-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-05 314-665-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-08-05 314-665-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-07-26 314-768-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J ST LOUIS MO
2013-07-16 314-278-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 KIRKWOOD MO
2013-07-16 314-278-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 KIRKWOOD MO
2013-07-16 314-278-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 KIRKWOOD MO
2013-07-05 314-371-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2013-07-05 314-371-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2013-07-05 314-371-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2013-07-05 314-371-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2013-07-05 314-371-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MO 5814 ST LOUIS MO
2013-07-05 314-658-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - MO 4932 ST LOUIS MO
2013-07-05 314-738-9XXX 9000–9999Assigned AT&T ENTERPRISES, LLC 516C LADUE MO
2013-07-01 314-297-1XXX 1000–1999Assigned SOUTHWESTERN BELL 9533 ST LOUIS MO
2013-07-01 314-297-2XXX 2000–2999Assigned SOUTHWESTERN BELL 9533 ST LOUIS MO
2013-07-01 314-297-3XXX 3000–3999Assigned SOUTHWESTERN BELL 9533 ST LOUIS MO
2013-07-01 314-297-4XXX 4000–4999Assigned SOUTHWESTERN BELL 9533 ST LOUIS MO
2013-07-01 314-297-5XXX 5000–5999Assigned SOUTHWESTERN BELL 9533 ST LOUIS MO
2013-07-01 314-942-6XXX 6000–6999Assigned CHARTER IP ENABLED SERVICES, LLC 792K LADUE MO
2013-06-28 314-942-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J LADUE MO
2013-06-24 314-548-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K CREVECOEUR MO
2013-06-24 314-658-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ST LOUIS MO
2013-06-17 314-665-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-06-17 314-665-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-06-17 314-665-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-06-11 314-319-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-06-11 314-319-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ST LOUIS MO
2013-06-11 314-319-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ST LOUIS 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.