NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

2 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2007-09-11 425-877-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-09-11 425-877-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-09-11 425-877-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-09-11 425-877-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-09-07 425-263-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 EVERETT WA
2007-09-06 425-780-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2007-09-06 425-780-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2007-09-02 425-945-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-09-02 425-956-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-09-02 425-974-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-08-28 425-361-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2007-08-27 425-512-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-08-27 425-512-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-08-27 425-512-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-08-27 425-512-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-08-27 425-512-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-08-22 425-582-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2007-08-21 425-282-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2007-08-21 425-502-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2007-08-21 425-502-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BELLEVUE WA
2007-08-20 425-953-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2007-08-20 425-953-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2007-08-16 425-677-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2007-08-16 425-677-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2007-08-06 425-433-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J MAPLE VLY WA
2007-07-31 425-289-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-07-31 425-289-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-07-31 425-372-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-07-31 425-372-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-07-31 425-635-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-07-31 425-647-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-07-23 425-405-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2007-07-19 425-420-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-07-19 425-420-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2007-07-17 425-368-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2007-07-16 425-289-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-06-21 425-270-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2007-06-21 425-493-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 EVERETT WA
2007-06-21 425-495-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2007-06-15 425-614-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2007-06-12 425-292-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J NORTH BEND WA
2007-06-08 425-968-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2007-06-08 425-968-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2007-05-30 425-216-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2007-05-30 425-493-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E EVERETT WA
2007-05-14 425-530-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-05-14 425-923-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2007-05-10 425-525-3XXX 3000–3999Assigned QWEST CORPORATION 9638 RENTON WA
2007-05-10 425-525-4XXX 4000–4999Assigned QWEST CORPORATION 9638 RENTON WA
2007-05-10 425-525-5XXX 5000–5999Assigned QWEST CORPORATION 9638 RENTON WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.