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
2019-01-17 425-428-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2019-01-15 425-655-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2019-01-15 425-655-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2019-01-15 425-655-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2019-01-15 425-655-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2019-01-15 425-655-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2019-01-14 425-480-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2019-01-11 425-535-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2019-01-10 425-620-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2019-01-10 425-620-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2019-01-10 425-620-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D BELLEVUE WA
2019-01-10 425-620-8XXX 8000–8999Assigned VONAGE AMERICA LLC 197D BELLEVUE WA
2019-01-10 425-620-9XXX 9000–9999Assigned VONAGE AMERICA LLC 197D BELLEVUE WA
2019-01-09 425-480-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2019-01-09 425-669-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2019-01-08 425-217-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2019-01-08 425-217-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2019-01-08 425-333-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E CARNATION WA
2019-01-08 425-414-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2019-01-08 425-414-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E ISSAQUAH WA
2019-01-08 425-490-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2019-01-08 425-620-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2019-01-08 425-620-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2019-01-08 425-620-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2019-01-08 425-655-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2019-01-08 425-689-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2019-01-08 425-689-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2019-01-08 425-728-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E RENTON WA
2019-01-08 425-728-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RENTON WA
2019-01-07 425-414-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2018-12-06 425-620-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D BELLEVUE WA
2018-12-06 425-620-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D BELLEVUE WA
2018-12-03 425-410-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-12-03 425-410-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-12-03 425-410-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2018-12-03 425-535-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2018-11-28 425-217-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BOTHELL WA
2018-11-28 425-414-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ISSAQUAH WA
2018-11-28 425-655-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KIRKLAND WA
2018-11-16 425-535-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2018-11-16 425-655-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2018-11-14 425-428-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2018-11-07 425-414-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2018-11-05 425-389-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-11-05 425-389-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-11-05 425-389-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-11-05 425-410-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2018-11-05 425-535-9XXX 9000–9999Assigned HD CARRIER LLC 321J EVERETT WA
2018-11-05 425-655-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2018-11-02 425-389-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE 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.