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
2024-01-09 425-560-0XXX 0000–0999Assigned FIVE9, INC. 598J KIRKLAND WA
2024-01-08 425-479-0XXX 0000–0999Assigned TELNYX LLC 073H RENTON WA
2024-01-08 425-550-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2023-12-11 425-479-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2023-12-11 425-479-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2023-12-10 425-550-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2023-12-05 425-552-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SILVERLAKE WA
2023-11-14 425-660-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 MAPLE VLY WA
2023-11-06 425-473-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2023-10-23 425-473-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2023-10-23 425-547-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2023-10-19 425-550-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2023-10-17 425-550-0XXX 0000–0999Assigned TERRA NOVA TELECOM INC. 145J HALLS LAKE WA
2023-10-13 425-476-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2023-10-06 425-473-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2023-10-06 425-550-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2023-09-29 425-384-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2023-09-01 425-437-6XXX 6000–6999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MAPLE VLY WA
2023-09-01 425-832-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ISSAQUAH WA
2023-08-11 425-475-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2023-08-11 425-725-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2023-07-25 425-547-1XXX 1000–1999Assigned METROPCS, INC. 5562 RENTON WA
2023-07-25 425-552-0XXX 0000–0999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2023-07-06 425-384-1XXX 1000–1999Assigned TELNYX LLC 073H BOTHELL WA
2023-06-16 425-725-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2023-06-15 425-473-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RENTON WA
2023-06-15 425-473-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RENTON WA
2023-06-15 425-473-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RENTON WA
2023-06-15 425-473-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RENTON WA
2023-06-06 425-476-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2023-06-06 425-476-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2023-05-11 425-725-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2023-05-11 425-725-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2023-05-11 425-725-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2023-05-03 425-476-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BOTHELL WA
2023-05-01 425-474-0XXX 0000–0999Assigned BOOST SUBSCRIBERCO L.L.C. 490J EVERETT WA
2023-05-01 425-476-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BOTHELL WA
2023-05-01 425-536-6XXX 6000–6999Assigned BOOST SUBSCRIBERCO L.L.C. 490J BELLEVUE WA
2023-05-01 425-578-2XXX 2000–2999Assigned BOOST SUBSCRIBERCO L.L.C. 490J MAPLE VLY WA
2023-04-27 425-536-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2023-04-25 425-472-0XXX 0000–0999Assigned EON TELECOM, INC. 839J BELLEVUE WA
2023-04-25 425-474-1XXX 1000–1999Assigned EON TELECOM, INC. 839J EVERETT WA
2023-04-14 425-476-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2023-04-14 425-476-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2023-04-14 425-476-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2023-04-13 425-473-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E RENTON WA
2023-03-31 425-474-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2023-03-17 425-473-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2023-03-03 425-536-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2023-03-03 425-536-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE 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.