NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

34 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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 442
NEW CINGULAR WIRELESS PCS, LLC 14
ONVOY, LLC - CA 10
HD CARRIER LLC 4
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 2
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2
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
2014-08-22 442-235-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2014-08-07 442-237-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ESCONDIDO CA
2014-08-07 442-237-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ESCONDIDO CA
2014-08-06 442-226-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BRAWLEY CA
2014-07-30 442-237-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2014-07-28 442-245-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISTA CA
2014-07-28 442-245-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISTA CA
2014-07-28 442-245-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VISTA CA
2014-07-22 442-235-5XXX 5000–5999Assigned HD CARRIER LLC 321J BARSTOW CA
2014-07-22 442-243-3XXX 3000–3999Assigned HD CARRIER LLC 321J VICTORVL CA
2014-07-10 442-229-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VICTORVL CA
2014-07-10 442-400-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INDIO CA
2014-07-10 442-800-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VTVL HSPR CA
2014-07-09 442-500-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C OCSD OCSD CA
2014-07-08 442-233-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E LENWOOD CA
2014-07-08 442-235-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BARSTOW CA
2014-07-08 442-237-0XXX 0000–0999Assigned METROPCS, INC. 5562 ESCONDIDO CA
2014-07-03 442-232-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OCSD CRLS CA
2014-07-02 442-224-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 VISTA CA
2014-06-30 442-253-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CALIPATRIA CA
2014-06-30 442-600-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D VTVL HSPR CA
2014-06-24 442-243-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VICTORVL CA
2014-06-24 442-243-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VICTORVL CA
2014-06-24 442-243-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VICTORVL CA
2014-06-24 442-243-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VICTORVL CA
2014-06-17 442-246-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 MORONGOVLY CA
2014-06-17 442-321-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - CA 7240 HOMESTDVLY CA
2014-06-16 442-800-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VTVL HSPR CA
2014-06-11 442-200-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 CALEXICO CA
2014-06-11 442-226-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BRAWLEY CA
2014-06-10 442-235-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BARSTOW CA
2014-06-10 442-900-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OCOTILLO CA
2014-05-28 442-228-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J BISHOP CA
2014-05-27 442-224-7XXX 7000–7999Assigned AT&T ENTERPRISES, LLC 516C VISTA CA
2014-05-27 442-229-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VICTORVL CA
2014-05-27 442-229-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VICTORVL CA
2014-05-27 442-229-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VICTORVL CA
2014-05-09 442-232-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OCSD CRLS CA
2014-05-05 442-229-2XXX 2000–2999Assigned CHARTER IP ENABLED SERVICES, LLC 792K VICTORVL CA
2014-05-01 442-236-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2014-04-23 442-600-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VTVL HSPR CA
2014-04-23 442-600-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E VTVL HSPR CA
2014-04-11 442-234-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PALM SPG CA
2014-04-11 442-234-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PALM SPG CA
2014-04-11 442-234-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PALM SPG CA
2014-04-07 442-232-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 OCSD CRLS CA
2014-04-01 442-227-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALMDESERT CA
2014-03-25 442-231-9XXX 9000–9999Assigned METROPCS, INC. 5562 EL CENTRO CA
2014-03-24 442-236-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EL CENTRO CA
2014-03-13 442-229-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VICTORVL CA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.