NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 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
2015-12-16 425-979-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-12-16 425-979-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2015-12-14 425-529-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2015-12-14 425-529-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2015-12-14 425-970-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E RENTON WA
2015-12-14 425-970-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E RENTON WA
2015-12-09 425-375-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2015-12-09 425-599-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2015-12-09 425-599-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2015-12-09 425-979-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2015-12-03 425-375-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2015-11-30 425-529-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2015-11-25 425-224-9XXX 9000–9999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2015-11-24 425-270-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2015-11-24 425-310-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MAPLE VLY WA
2015-11-23 425-528-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E RENTON WA
2015-11-16 425-599-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 HALLS LAKE WA
2015-11-11 425-224-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
2015-11-11 425-321-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SILVERLAKE WA
2015-11-11 425-399-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
2015-11-11 425-507-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ISSAQUAH WA
2015-11-11 425-979-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2015-11-10 425-365-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2015-11-10 425-365-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2015-11-10 425-902-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2015-10-30 425-365-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2015-10-29 425-595-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2015-10-15 425-365-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-10-15 425-365-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-10-13 425-598-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2015-10-12 425-236-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2015-10-12 425-236-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2015-10-12 425-287-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2015-10-09 425-236-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2015-10-09 425-245-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2015-10-09 425-309-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2015-10-06 425-236-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2015-09-29 425-954-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2015-09-24 425-595-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2015-09-21 425-902-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2015-09-17 425-595-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2015-09-16 425-287-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2015-09-16 425-309-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2015-09-16 425-598-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2015-09-15 425-578-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2015-09-15 425-979-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2015-09-11 425-394-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2015-09-11 425-394-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2015-09-10 425-385-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2015-09-10 425-385-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA

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.