NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

21 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 949
NEW CINGULAR WIRELESS PCS, LLC 18
ONVOY, LLC - CA 2
OPENTACT INC. 1
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
2018-01-04 949-317-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 SADLBK VLY CA
2017-12-22 949-321-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NEWPORTBCH CA
2017-12-20 949-312-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C CAPITRNVLY CA
2017-12-20 949-312-9XXX 9000–9999Assigned ONVOY, LLC - CA 649C CAPITRNVLY CA
2017-12-19 949-321-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NEWPORTBCH CA
2017-12-19 949-321-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NEWPORTBCH CA
2017-12-14 949-403-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2017-12-14 949-403-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2017-12-14 949-403-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2017-12-06 949-321-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NEWPORTBCH CA
2017-12-06 949-321-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NEWPORTBCH CA
2017-12-01 949-277-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SADLBK VLY CA
2017-12-01 949-318-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SADLBK VLY CA
2017-12-01 949-318-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SADLBK VLY CA
2017-12-01 949-318-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SADLBK VLY CA
2017-12-01 949-318-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 SADLBK VLY CA
2017-12-01 949-319-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 TRABUCO CA
2017-12-01 949-319-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 TRABUCO CA
2017-12-01 949-319-3XXX 3000–3999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 TRABUCO CA
2017-11-30 949-320-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LAGUNA BCH CA
2017-11-30 949-320-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LAGUNA BCH CA
2017-11-30 949-320-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LAGUNA BCH CA
2017-11-30 949-320-4XXX 4000–4999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 LAGUNA BCH CA
2017-11-30 949-808-0XXX 0000–0999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 NEWPORTBCH CA
2017-11-29 949-352-1XXX 1000–1999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 CAPITRNVLY CA
2017-11-29 949-352-2XXX 2000–2999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 CAPITRNVLY CA
2017-11-29 949-352-5XXX 5000–5999Assigned UTILITY TELECOM GROUP, LLC - CA 9262 CAPITRNVLY CA
2017-11-21 949-404-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J IRVINE CA
2017-11-03 949-767-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SADLBK VLY CA
2017-10-25 949-320-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2017-10-25 949-403-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 LAGUNA BCH CA
2017-10-25 949-404-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IRVINE CA
2017-10-24 949-742-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TRABUCO CA
2017-10-18 949-404-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L IRVINE CA
2017-10-18 949-528-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C SADLBK VLY CA
2017-10-18 949-528-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SADLBK VLY CA
2017-10-18 949-575-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C SADLBK VLY CA
2017-09-29 949-316-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 IRVINE CA
2017-09-29 949-543-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 IRVINE CA
2017-09-28 949-401-1XXX 1000–1999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L RNCHOVIEJO CA
2017-09-26 949-312-2XXX 2000–2999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L CAPITRNVLY CA
2017-09-26 949-316-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L IRVINE CA
2017-09-26 949-316-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 IRVINE CA
2017-09-26 949-329-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L TRABUCO CA
2017-09-26 949-520-7XXX 7000–7999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L NEWPORTBCH CA
2017-09-26 949-549-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L LAGUNA BCH CA
2017-09-21 949-316-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 IRVINE CA
2017-09-21 949-549-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LAGUNA BCH CA
2017-09-20 949-316-1XXX 1000–1999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 IRVINE CA
2017-09-19 949-317-0XXX 0000–0999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L SADLBK VLY CA

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.