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
2009-12-17 425-903-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J EVERETT WA
2009-11-18 425-200-1XXX 1000–1999Assigned IP HORIZON LLC 515J ISSAQUAH WA
2009-11-18 425-390-3XXX 3000–3999Assigned IP HORIZON LLC 515J RENTON WA
2009-11-18 425-457-8XXX 8000–8999Assigned IP HORIZON LLC 515J BELLEVUE WA
2009-11-17 425-658-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2009-11-12 425-880-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 AMES LAKE WA
2009-11-06 425-449-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2009-11-06 425-449-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2009-11-06 425-582-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J HALLS LAKE WA
2009-10-15 425-629-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 KIRKLAND WA
2009-10-09 425-419-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2009-10-09 425-419-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2009-10-09 425-587-0XXX 0000–0999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2009-09-28 425-622-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2009-09-24 425-419-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2009-09-22 425-406-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KIRKLAND WA
2009-09-22 425-419-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BOTHELL WA
2009-09-22 425-582-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 HALLS LAKE WA
2009-09-17 425-312-0XXX 0000–0999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 EVERETT WA
2009-09-17 425-947-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 KIRKLAND WA
2009-09-14 425-516-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2009-09-09 425-336-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 RENTON WA
2009-09-09 425-394-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 ISSAQUAH WA
2009-09-09 425-582-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2009-09-09 425-998-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2009-08-26 425-590-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2009-08-25 425-728-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RENTON WA
2009-08-11 425-516-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2009-08-11 425-516-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2009-07-10 425-877-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2009-06-23 425-200-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2009-06-16 425-361-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2009-06-03 425-207-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RENTON WA
2009-06-03 425-270-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2009-06-03 425-622-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2009-05-07 425-310-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2009-05-07 425-440-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2009-04-28 425-270-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2009-04-28 425-610-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2009-04-28 425-780-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J BOTHELL WA
2009-04-15 425-276-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2009-04-15 425-967-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 HALLS LAKE WA
2009-03-13 425-697-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2009-03-10 425-224-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2009-03-05 425-440-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2009-03-05 425-740-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 EVERETT WA
2009-02-26 425-877-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2009-02-11 425-282-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 RENTON WA
2009-02-11 425-988-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 RENTON WA
2009-01-28 425-877-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BOTHELL 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.