NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 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 425
NEW CINGULAR WIRELESS PCS, LLC 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
2021-08-12 425-517-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2021-08-06 425-537-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2021-08-06 425-537-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2021-08-06 425-966-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SNOQUMPASS WA
2021-08-03 425-216-8XXX 8000–8999Assigned COMMIO, LLC 939H KIRKLAND WA
2021-08-03 425-285-6XXX 6000–6999Assigned COMMIO, LLC 939H KIRKLAND WA
2021-08-03 425-307-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KIRKLAND WA
2021-08-03 425-490-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J FALL CITY WA
2021-08-03 425-522-9XXX 9000–9999Assigned COMMIO, LLC 939H KIRKLAND WA
2021-08-03 425-587-9XXX 9000–9999Assigned COMMIO, LLC 939H KIRKLAND WA
2021-08-03 425-946-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J CARNATION WA
2021-07-30 425-367-5XXX 5000–5999Assigned COMMIO, LLC 939H EVERETT WA
2021-07-30 425-386-9XXX 9000–9999Assigned COMMIO, LLC 939H EVERETT WA
2021-07-30 425-521-4XXX 4000–4999Assigned COMMIO, LLC 939H EVERETT WA
2021-07-23 425-667-8XXX 8000–8999Assigned FRACTEL, LLC 965H BOTHELL WA
2021-07-23 425-842-5XXX 5000–5999Assigned FRACTEL, LLC 965H NORTH BEND WA
2021-07-23 425-946-3XXX 3000–3999Assigned FRACTEL, LLC 965H CARNATION WA
2021-07-23 425-966-6XXX 6000–6999Assigned FRACTEL, LLC 965H SNOQUMPASS WA
2021-07-16 425-500-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-07-16 425-500-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-07-16 425-500-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-07-16 425-500-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-07-16 425-500-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-07-16 425-500-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-07-06 425-465-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2021-07-06 425-517-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RENTON WA
2021-07-06 425-534-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2021-07-06 425-534-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2021-07-06 425-534-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2021-07-01 425-537-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-07-01 425-537-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-07-01 425-537-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-07-01 425-537-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-06-22 425-500-1XXX 1000–1999Assigned TELNYX LLC 073H BELLEVUE WA
2021-06-14 425-537-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 BOTHELL WA
2021-06-09 425-537-9XXX 9000–9999Assigned TON80 COMMUNICATIONS, LLC 516J BOTHELL WA
2021-06-08 425-500-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-06-08 425-866-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-06-08 425-866-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-06-08 425-866-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2021-06-07 425-663-9XXX 9000–9999Assigned TON80 COMMUNICATIONS, LLC 516J RENTON WA
2021-05-28 425-357-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2021-05-28 425-371-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-05-28 425-371-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-05-28 425-371-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-05-28 425-371-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2021-05-28 425-386-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E EVERETT WA
2021-05-28 425-386-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E EVERETT WA
2021-05-28 425-386-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E EVERETT WA
2021-05-28 425-386-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E EVERETT WA

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.