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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2016-10-07 425-585-1XXX 1000–1999Assigned WIDE VOICE, LLC - WA 707G SILVERLAKE WA
2016-10-07 425-996-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2016-09-23 425-448-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2016-09-23 425-448-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2016-09-23 425-448-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2016-09-23 425-616-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2016-09-23 425-616-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2016-09-23 425-616-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2016-09-23 425-659-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2016-09-23 425-659-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2016-09-23 425-659-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2016-09-22 425-625-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2016-09-19 425-362-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-09-19 425-362-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-09-07 425-215-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BOTHELL WA
2016-09-07 425-426-2XXX 2000–2999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F EVERETT WA
2016-09-01 425-362-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-09-01 425-362-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-08-18 425-225-0XXX 0000–0999Assigned HD CARRIER LLC 321J SILVERLAKE WA
2016-08-18 425-225-9XXX 9000–9999Assigned HD CARRIER LLC 321J SILVERLAKE WA
2016-08-09 425-215-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2016-08-09 425-215-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2016-08-09 425-616-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2016-08-08 425-426-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-08-08 425-426-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-07-15 425-215-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-07-15 425-215-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-07-13 425-390-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RENTON WA
2016-07-08 425-240-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-07-08 425-240-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-07-08 425-240-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-07-07 425-215-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BOTHELL WA
2016-07-01 425-616-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F HALLS LAKE WA
2016-06-27 425-399-3XXX 3000–3999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2016-06-24 425-336-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RENTON WA
2016-06-21 425-553-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-06-21 425-553-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-06-17 425-240-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2016-06-17 425-240-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2016-06-17 425-240-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-06-17 425-240-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-06-14 425-529-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-06-14 425-529-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-06-14 425-657-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2016-06-10 425-240-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-06-10 425-240-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-06-07 425-215-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-06-07 425-215-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-05-23 425-690-0XXX 0000–0999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 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.