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
2014-10-01 425-236-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2014-10-01 425-236-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2014-09-30 425-559-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2014-09-23 425-595-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2014-09-19 425-295-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2014-09-19 425-394-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2014-09-19 425-394-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2014-09-19 425-524-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2014-09-19 425-524-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2014-09-19 425-524-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2014-09-19 425-524-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2014-09-18 425-219-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2014-09-18 425-219-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2014-09-18 425-309-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2014-09-18 425-309-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2014-09-18 425-321-9XXX 9000–9999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2014-09-18 425-496-5XXX 5000–5999Assigned METROPCS, INC. 5562 RENTON WA
2014-09-18 425-499-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-09-18 425-499-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-09-18 425-499-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-09-18 425-835-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2014-09-12 425-219-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2014-09-12 425-219-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2014-09-12 425-499-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2014-09-12 425-921-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2014-09-12 425-977-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2014-09-04 425-219-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2014-09-03 425-229-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2014-08-29 425-499-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-08-29 425-499-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-08-29 425-499-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-08-29 425-499-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-08-29 425-499-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-08-29 425-977-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 HALLS LAKE WA
2014-08-22 425-229-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2014-08-22 425-397-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2014-08-22 425-563-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2014-08-22 425-610-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2014-08-19 425-219-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2014-08-19 425-977-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2014-08-18 425-229-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2014-08-18 425-229-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2014-08-18 425-229-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2014-08-18 425-272-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-08-18 425-272-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-08-18 425-305-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2014-08-14 425-405-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2014-08-06 425-219-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2014-07-31 425-305-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2014-07-24 425-757-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON 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.