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
2013-09-13 425-892-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2013-09-11 425-531-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2013-09-10 425-528-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2013-09-09 425-757-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2013-09-09 425-757-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2013-09-05 425-209-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2013-09-04 425-209-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-09-04 425-209-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-08-30 425-471-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J BOTHELL WA
2013-08-30 425-551-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E EVERETT WA
2013-08-30 425-678-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2013-08-13 425-319-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2013-08-13 425-531-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2013-08-12 425-610-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2013-08-01 425-363-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J NORTH BEND WA
2013-07-30 425-209-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-07-18 425-407-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2013-07-18 425-531-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2013-06-26 425-678-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2013-06-19 425-419-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J BOTHELL WA
2013-05-24 425-658-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KIRKLAND WA
2013-05-23 425-321-7XXX 7000–7999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2013-05-23 425-321-8XXX 8000–8999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2013-05-23 425-496-4XXX 4000–4999Assigned METROPCS, INC. 5562 RENTON WA
2013-05-15 425-435-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-05-14 425-419-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2013-05-10 425-953-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2013-04-15 425-209-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-04-15 425-209-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-04-05 425-273-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2013-04-05 425-286-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2013-04-01 425-441-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J FALL CITY WA
2013-03-20 425-324-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2013-03-19 425-772-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2013-03-14 425-728-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RENTON WA
2013-03-06 425-898-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2013-02-26 425-225-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2013-02-25 425-363-5XXX 5000–5999Assigned CENTURYTEL OF WASHINGTON, INC. DBA CENTURYLINK 2408 NORTH BEND WA
2013-02-19 425-435-2XXX 2000–2999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 BELLEVUE WA
2013-01-28 425-324-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2013-01-28 425-324-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2013-01-24 425-409-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 HALLS LAKE WA
2013-01-24 425-654-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 ISSAQUAH WA
2013-01-16 425-324-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2013-01-16 425-405-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2013-01-11 425-273-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2013-01-11 425-324-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2013-01-11 425-757-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2013-01-11 425-757-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 RENTON WA
2013-01-11 425-757-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 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.