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
2014-11-10 442-283-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CENTRO CA
2014-11-07 442-248-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2014-11-05 442-252-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E CALEXICO CA
2014-10-31 442-226-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E BRAWLEY CA
2014-10-31 442-235-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2014-10-31 442-235-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2014-10-29 442-247-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CALIFORNCY CA
2014-10-28 442-615-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OCSD OCSD CA
2014-10-28 442-615-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OCSD OCSD CA
2014-10-27 442-900-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E OCOTILLO CA
2014-10-21 442-232-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OCSD CRLS CA
2014-10-17 442-264-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 OCSD OCSD CA
2014-10-17 442-264-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OCSD OCSD CA
2014-10-14 442-227-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PALMDESERT CA
2014-10-09 442-248-8XXX 8000–8999Assigned AT&T ENTERPRISES, LLC 516C ESCONDIDO CA
2014-10-03 442-226-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C BRAWLEY CA
2014-10-03 442-234-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 PALM SPG CA
2014-10-03 442-234-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 PALM SPG CA
2014-09-26 442-248-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ESCONDIDO CA
2014-09-26 442-248-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ESCONDIDO CA
2014-09-26 442-248-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 ESCONDIDO CA
2014-09-23 442-236-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CENTRO CA
2014-09-23 442-236-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CENTRO CA
2014-09-23 442-236-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CENTRO CA
2014-09-23 442-236-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 EL CENTRO CA
2014-09-18 442-245-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C VISTA CA
2014-09-18 442-245-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C VISTA CA
2014-09-18 442-245-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 VISTA CA
2014-09-17 442-226-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2014-09-17 442-234-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 PALM SPG CA
2014-09-17 442-236-0XXX 0000–0999Assigned METROPCS, INC. 5562 EL CENTRO CA
2014-09-17 442-236-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2014-09-17 442-237-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2014-09-12 442-800-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 VTVL HSPR CA
2014-09-10 442-800-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D VTVL HSPR CA
2014-09-10 442-800-9XXX 9000–9999Assigned METROPCS NETWORKS, LLC 899D VTVL HSPR CA
2014-09-05 442-226-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BRAWLEY CA
2014-09-05 442-232-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 OCSD CRLS CA
2014-09-05 442-300-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INDIO CA
2014-09-05 442-400-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 INDIO CA
2014-09-03 442-247-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CALIFORNCY CA
2014-09-02 442-236-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF CALIFORNIA, LP - CA 7718 EL CENTRO CA
2014-08-29 442-237-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ESCONDIDO CA
2014-08-29 442-237-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C ESCONDIDO CA
2014-08-29 442-237-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C ESCONDIDO CA
2014-08-29 442-300-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INDIO CA
2014-08-29 442-300-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INDIO CA
2014-08-28 442-500-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OCSD OCSD CA
2014-08-26 442-232-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C OCSD CRLS CA
2014-08-26 442-232-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C OCSD CRLS 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.