NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

31 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 442
NEW CINGULAR WIRELESS PCS, LLC 14
ONVOY, LLC - CA 8
HD CARRIER LLC 4
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CA 2
PEERLESS NETWORK OF CALIFORNIA, LLC - CA 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
2019-01-17 442-290-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 PALM SPG CA
2019-01-11 442-219-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VICTORVL CA
2018-12-12 442-277-4XXX 4000–4999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ESCONDIDO CA
2018-12-12 442-277-8XXX 8000–8999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ESCONDIDO CA
2018-12-12 442-286-6XXX 6000–6999Assigned COMCAST PHONE OF CALIFORNIA, LLC 394L ESCONDIDO CA
2018-12-03 442-279-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2018-12-03 442-279-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2018-12-03 442-484-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2018-12-03 442-484-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2018-11-26 442-465-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OCOTILLO CA
2018-11-21 442-205-2XXX 2000–2999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F YUCCA VLY CA
2018-11-21 442-214-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F TWNTYNPLMS CA
2018-11-21 442-233-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LENWOOD CA
2018-11-21 442-260-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F DSERTHTSPG CA
2018-11-21 442-269-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F JOSHUATREE CA
2018-11-15 442-201-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LEE VINING CA
2018-11-15 442-382-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F VTVL HSPR CA
2018-11-05 442-250-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 CALEXICO CA
2018-10-18 442-276-1XXX 1000–1999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PINYON CA
2018-10-17 442-261-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F SHOSHONE CA
2018-10-17 442-484-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2018-10-16 442-303-9XXX 9000–9999Assigned METROPCS, INC. 5562 OCSD CRLS CA
2018-10-11 442-218-7XXX 7000–7999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LKISABELLA CA
2018-10-11 442-288-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 OCSD PDTN CA
2018-10-11 442-294-2XXX 2000–2999Assigned METROPCS, INC. 5562 RIDGECREST CA
2018-10-10 442-212-8XXX 8000–8999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-268-2XXX 2000–2999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-268-3XXX 3000–3999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-268-4XXX 4000–4999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-275-2XXX 2000–2999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-275-3XXX 3000–3999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-290-1XXX 1000–1999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-290-2XXX 2000–2999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-290-3XXX 3000–3999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-10 442-290-4XXX 4000–4999Assigned NUSO, LLC 551G PALM SPG CA
2018-10-08 442-266-5XXX 5000–5999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F OCSD OCSD CA
2018-10-08 442-334-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F PALMDESERT CA
2018-10-04 442-279-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2018-10-04 442-280-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BARSTOW CA
2018-09-28 442-302-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LUCERNEVLY CA
2018-09-28 442-325-6XXX 6000–6999Assigned TWC IP ENABLED SERVICES, LLC 793K OCSD CRLS CA
2018-09-26 442-515-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - CA 8826 SAN MARCOS CA
2018-09-25 442-233-8XXX 8000–8999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F LENWOOD CA
2018-09-25 442-246-6XXX 6000–6999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F MORONGOVLY CA
2018-09-25 442-250-4XXX 4000–4999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F CALEXICO CA
2018-09-25 442-321-9XXX 9000–9999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F HOMESTDVLY CA
2018-09-25 442-484-3XXX 3000–3999Assigned PEERLESS NETWORK OF CALIFORNIA, LLC - CA 373F INDIO CA
2018-09-07 442-484-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2018-08-08 442-280-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C BARSTOW CA
2018-08-08 442-280-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C BARSTOW 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.