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
2011-04-07 425-622-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-04-07 425-622-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-04-07 425-949-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2011-04-06 425-623-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2011-03-29 425-295-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2011-03-29 425-623-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2011-03-15 425-409-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2011-03-14 425-786-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-03-14 425-974-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-03-11 425-404-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-03-11 425-404-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-03-02 425-610-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-02-28 425-292-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E NORTH BEND WA
2011-02-18 425-394-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J ISSAQUAH WA
2011-02-03 425-953-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-02-03 425-953-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-02-02 425-623-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2011-01-28 425-247-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2011-01-28 425-404-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 EVERETT WA
2011-01-19 425-270-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F ISSAQUAH WA
2011-01-19 425-633-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-01-19 425-633-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-01-19 425-728-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E RENTON WA
2011-01-14 425-285-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KIRKLAND WA
2011-01-11 425-633-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2011-01-11 425-633-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2010-12-23 425-225-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2010-12-22 425-315-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2010-12-17 425-629-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2010-12-13 425-200-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2010-12-13 425-264-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E RENTON WA
2010-12-13 425-264-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E RENTON WA
2010-12-13 425-358-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2010-12-10 425-250-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2010-12-10 425-633-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J BELLEVUE WA
2010-12-08 425-412-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2010-12-07 425-247-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 BELLEVUE WA
2010-12-07 425-247-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2010-11-22 425-908-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2010-11-12 425-686-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2010-11-10 425-404-4XXX 4000–4999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-5XXX 5000–5999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-7XXX 7000–7999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-10 425-404-8XXX 8000–8999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2010-11-05 425-312-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2010-11-05 425-633-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2010-11-03 425-903-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2010-10-27 425-242-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2010-10-27 425-243-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F 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.