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
2014-07-17 425-229-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2014-07-17 425-229-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2014-07-16 425-219-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2014-07-09 425-523-2XXX 2000–2999Assigned METROPCS, INC. 5562 RENTON WA
2014-07-09 425-948-3XXX 3000–3999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2014-07-02 425-219-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2014-06-30 425-229-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-30 425-229-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-30 425-229-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-26 425-276-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E RENTON WA
2014-06-24 425-326-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-06-20 425-524-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2014-06-17 425-219-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2014-06-17 425-326-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2014-06-17 425-678-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2014-06-17 425-967-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2014-06-16 425-305-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2014-06-16 425-395-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2014-06-13 425-326-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2014-06-10 425-297-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2014-06-10 425-606-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2014-06-10 425-606-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2014-06-10 425-606-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2014-06-10 425-740-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2014-06-10 425-921-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2014-06-06 425-420-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2014-06-06 425-446-3XXX 3000–3999Assigned PAETEC ITEL, LLC 829J EVERETT WA
2014-05-30 425-326-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2014-05-23 425-332-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2014-05-09 425-835-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2014-05-09 425-918-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2014-05-05 425-951-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2014-05-01 425-305-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2014-05-01 425-326-4XXX 4000–4999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 BELLEVUE WA
2014-04-28 425-367-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2014-04-24 425-654-6XXX 6000–6999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ISSAQUAH WA
2014-04-24 425-654-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ISSAQUAH WA
2014-04-24 425-654-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ISSAQUAH WA
2014-04-11 425-757-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2014-04-10 425-326-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2014-03-17 425-326-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2014-03-14 425-970-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 RENTON WA
2014-03-11 425-341-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SILVERLAKE WA
2014-03-11 425-919-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2014-03-06 425-326-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-03-06 425-326-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-03-06 425-326-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2014-03-05 425-951-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BOTHELL WA
2014-02-25 425-321-4XXX 4000–4999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2014-02-25 425-551-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT 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.