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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2021-03-15 442-217-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VALLEY CTR CA
2021-03-15 442-599-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2021-03-15 442-599-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2021-03-15 442-599-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 INDIO CA
2021-03-12 442-354-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-12 442-354-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-12 442-354-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-12 442-354-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-12 442-354-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-12 442-354-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-12 442-354-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-10 442-377-7XXX 7000–7999Assigned FRACTEL, LLC 965H BAKER CA
2021-03-10 442-789-9XXX 9000–9999Assigned FRACTEL, LLC 965H WELDON CA
2021-03-09 442-238-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2021-03-09 442-238-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2021-03-09 442-238-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2021-03-09 442-238-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EL CENTRO CA
2021-03-09 442-320-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2021-03-09 442-340-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BRAWLEY CA
2021-03-09 442-877-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2021-03-09 442-877-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2021-03-05 442-386-3XXX 3000–3999Assigned FRACTEL, LLC 965H VICTORVL CA
2021-03-01 442-799-9XXX 9000–9999Assigned FRACTEL, LLC 965H TWNTYNPLMS CA
2021-02-22 442-207-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 FALLBROOK CA
2021-02-22 442-207-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 FALLBROOK CA
2021-02-22 442-216-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 VISTA CA
2021-02-22 442-216-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 VISTA CA
2021-02-22 442-216-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 VISTA CA
2021-02-22 442-266-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 OCSD OCSD CA
2021-02-22 442-266-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 OCSD OCSD CA
2021-02-22 442-341-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2021-02-22 442-341-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2021-02-22 442-341-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ESCONDIDO CA
2021-02-18 442-288-2XXX 2000–2999Assigned METROPCS, INC. 5562 OCSD PDTN CA
2021-02-18 442-599-0XXX 0000–0999Assigned METROPCS NETWORKS, LLC 899D INDIO CA
2021-02-14 442-642-0XXX 0000–0999Assigned TELNYX LLC 073H NEWBERRY CA
2021-02-12 442-353-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 VICTORVL CA
2021-02-12 442-353-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 VICTORVL CA
2021-02-11 442-320-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2021-02-11 442-320-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ENCINITAS CA
2021-02-05 442-208-7XXX 7000–7999Assigned ONVOY, LLC - CA 649C CALIPATRIA CA
2021-02-05 442-208-8XXX 8000–8999Assigned ONVOY, LLC - CA 649C CALIPATRIA CA
2021-02-05 442-423-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 LKISABELLA CA
2021-02-05 442-588-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C HOMESTDVLY CA
2021-02-04 442-301-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C JUNE LAKE CA
2021-02-04 442-301-6XXX 6000–6999Assigned ONVOY, LLC - CA 649C JUNE LAKE CA
2021-02-04 442-699-2XXX 2000–2999Assigned ONVOY, LLC - CA 649C TRONA CA
2021-02-04 442-699-3XXX 3000–3999Assigned ONVOY, LLC - CA 649C TRONA CA
2021-02-04 442-699-4XXX 4000–4999Assigned ONVOY, LLC - CA 649C TRONA CA
2021-02-02 442-304-5XXX 5000–5999Assigned ONVOY, LLC - CA 649C EAGLE MT 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.