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
2018-06-12 425-624-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2018-06-12 425-624-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BELLEVUE WA
2018-06-07 425-588-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2018-05-25 425-624-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-05-25 425-624-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-05-25 425-624-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-05-23 425-395-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-05-23 425-677-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-05-23 425-996-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-05-11 425-578-5XXX 5000–5999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MAPLE VLY WA
2018-05-09 425-948-8XXX 8000–8999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2018-05-08 425-961-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-05-08 425-961-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-04-27 425-625-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-04-27 425-625-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-04-27 425-625-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-04-17 425-363-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 NORTH BEND WA
2018-04-13 425-625-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-04-11 425-624-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-04-11 425-624-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-04-10 425-588-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2018-03-27 425-395-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2018-03-20 425-393-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-03-20 425-393-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-03-20 425-393-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-01-08 425-363-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2018-01-04 425-382-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2017-12-07 425-490-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J FALL CITY WA
2017-12-01 425-961-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2017-11-28 425-528-3XXX 3000–3999Assigned METROPCS, INC. 5562 RENTON WA
2017-11-28 425-528-4XXX 4000–4999Assigned METROPCS, INC. 5562 RENTON WA
2017-11-21 425-625-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-11-21 425-800-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-11-21 425-800-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2017-11-16 425-800-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2017-11-16 425-800-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2017-11-16 425-800-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2017-11-09 425-382-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2017-11-08 425-382-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E EVERETT WA
2017-11-08 425-382-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E EVERETT WA
2017-11-08 425-382-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E EVERETT WA
2017-11-08 425-382-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E EVERETT WA
2017-11-07 425-505-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2017-11-07 425-967-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2017-10-31 425-659-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2017-10-31 425-659-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2017-10-31 425-659-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2017-10-30 425-416-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2017-10-13 425-382-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2017-10-12 425-800-1XXX 1000–1999Assigned HD CARRIER LLC 321J 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.