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
2018-11-02 425-389-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-10-23 425-599-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2018-10-18 425-390-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2018-10-18 425-390-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2018-10-18 425-496-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2018-10-18 425-657-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-10-18 425-905-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2018-10-17 425-524-8XXX 8000–8999Assigned METROPCS, INC. 5562 RENTON WA
2018-10-16 425-333-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F CARNATION WA
2018-10-16 425-389-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BELLEVUE WA
2018-10-16 425-528-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RENTON WA
2018-10-16 425-740-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F EVERETT WA
2018-10-09 425-584-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MAPLE VLY WA
2018-10-04 425-984-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2018-09-21 425-200-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-09-21 425-642-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-09-19 425-410-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-09-19 425-410-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-09-19 425-410-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-09-19 425-410-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-09-19 425-757-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2018-09-12 425-389-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-09-12 425-389-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-09-12 425-389-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-30 425-217-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2018-08-23 425-382-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2018-08-22 425-217-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BOTHELL WA
2018-08-22 425-410-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2018-08-15 425-389-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-10 425-217-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2018-08-10 425-393-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-10 425-393-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-10 425-393-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-10 425-625-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-10 425-625-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-08-10 425-655-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2018-08-10 425-961-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2018-07-24 425-393-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-07-24 425-393-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-07-24 425-393-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-07-24 425-606-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-07-24 425-651-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-07-24 425-732-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-07-13 425-624-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-07-13 425-624-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-07-13 425-624-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-07-13 425-732-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-07-03 425-448-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2018-06-27 425-528-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2018-06-15 425-363-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 NORTH BEND 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.