NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

17 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 424
ONVOY, LLC - CA 15
OPENTACT INC. 1
NEW CINGULAR WIRELESS PCS, LLC 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
2020-03-31 424-433-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SNMN SNMN CA
2020-03-18 424-434-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 CULVERCITY CA
2020-03-18 424-445-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2020-03-18 424-445-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2020-03-18 424-445-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2020-03-10 424-438-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BEVERLYHLS CA
2020-03-09 424-441-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MALIBU CA
2020-03-06 424-441-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MALIBU CA
2020-03-03 424-434-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CULVERCITY CA
2020-02-27 424-409-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 REDONDO CA
2020-02-27 424-428-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SNMN MRVS CA
2020-02-27 424-440-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 W ANGELES CA
2020-02-26 424-438-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 BEVERLYHLS CA
2020-02-26 424-438-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BEVERLYHLS CA
2020-02-25 424-439-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 INGLEWOOD CA
2020-02-25 424-499-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EL SEGUNDO CA
2020-02-05 424-415-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2020-01-20 424-440-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 W ANGELES CA
2019-12-20 424-436-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 6006 SNMN SNMN CA
2019-12-18 424-439-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2019-12-18 424-439-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2019-12-18 424-439-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2019-12-18 424-439-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 INGLEWOOD CA
2019-12-12 424-410-2XXX 2000–2999Assigned METROPCS NETWORKS, LLC 899D SNMN MRVS CA
2019-12-03 424-436-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SNMN SNMN CA
2019-12-02 424-438-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F BEVERLYHLS CA
2019-11-22 424-438-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D BEVERLYHLS CA
2019-11-13 424-422-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MALIBU CA
2019-11-04 424-328-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 LOMITA CA
2019-11-04 424-409-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 REDONDO CA
2019-10-23 424-450-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - CA 981E SAN PEDRO CA
2019-10-16 424-439-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 INGLEWOOD CA
2019-10-14 424-430-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2019-10-14 424-430-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 CMTN GRDN CA
2019-10-10 424-499-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EL SEGUNDO CA
2019-10-07 424-435-7XXX 7000–7999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 TORRANCE CA
2019-10-07 424-450-2XXX 2000–2999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 SAN PEDRO CA
2019-09-26 424-758-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 CMTN CMTN CA
2019-09-25 424-428-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SNMN MRVS CA
2019-09-25 424-437-0XXX 0000–0999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HAWTHORNE CA
2019-09-23 424-422-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MALIBU CA
2019-09-23 424-450-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN PEDRO CA
2019-09-23 424-450-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN PEDRO CA
2019-09-23 424-450-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN PEDRO CA
2019-09-23 424-450-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SAN PEDRO CA
2019-09-11 424-408-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2019-09-11 424-408-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 REDONDO CA
2019-09-11 424-439-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - CA 7139 INGLEWOOD CA
2019-09-05 424-435-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TORRANCE CA
2019-08-30 424-409-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 REDONDO 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.