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
2020-09-29 425-532-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-09-24 425-900-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-09-24 425-900-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-09-24 425-900-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-09-16 425-307-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2020-09-16 425-307-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2020-09-16 425-371-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2020-09-16 425-371-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2020-09-16 425-437-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2020-09-16 425-437-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E MAPLE VLY WA
2020-09-16 425-437-5XXX 5000–5999Assigned TELNYX LLC 073H MAPLE VLY WA
2020-09-16 425-490-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2020-09-16 425-490-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E FALL CITY WA
2020-09-16 425-666-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E EVERETT WA
2020-09-16 425-666-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E EVERETT WA
2020-09-16 425-689-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E AMES LAKE WA
2020-09-16 425-948-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SILVERLAKE WA
2020-09-16 425-981-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RENTON WA
2020-09-16 425-988-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RENTON WA
2020-09-16 425-988-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E RENTON WA
2020-09-15 425-900-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2020-09-15 425-900-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2020-09-14 425-572-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D RENTON WA
2020-09-14 425-666-4XXX 4000–4999Assigned HD CARRIER LLC 321J EVERETT WA
2020-09-14 425-666-5XXX 5000–5999Assigned HD CARRIER LLC 321J EVERETT WA
2020-09-14 425-981-6XXX 6000–6999Assigned VONAGE AMERICA LLC 197D RENTON WA
2020-09-09 425-477-4XXX 4000–4999Assigned VONAGE AMERICA LLC 197D ISSAQUAH WA
2020-09-09 425-477-7XXX 7000–7999Assigned VONAGE AMERICA LLC 197D ISSAQUAH WA
2020-09-04 425-276-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RENTON WA
2020-09-04 425-906-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 MAPLE VLY WA
2020-09-02 425-510-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-08-27 425-371-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2020-08-27 425-371-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2020-08-27 425-666-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2020-08-27 425-666-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2020-08-20 425-666-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2020-08-13 425-459-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-08-13 425-459-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-08-13 425-900-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-08-13 425-900-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-08-13 425-900-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-08-13 425-900-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-07-16 425-264-4XXX 4000–4999Assigned TELNYX LLC 073H RENTON WA
2020-07-15 425-666-6XXX 6000–6999Assigned FRACTEL, LLC 965H EVERETT WA
2020-07-15 425-900-0XXX 0000–0999Assigned FRACTEL, LLC 965H BELLEVUE WA
2020-07-10 425-316-7XXX 7000–7999Assigned METROPCS, INC. 5562 SILVERLAKE WA
2020-07-10 425-480-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 HALLS LAKE WA
2020-07-10 425-835-8XXX 8000–8999Assigned ELTOPIA COMMUNICATIONS, LLC - WA 663D HALLS LAKE WA
2020-07-10 425-880-8XXX 8000–8999Assigned ELTOPIA COMMUNICATIONS, LLC - WA 663D AMES LAKE WA
2020-06-30 425-285-8XXX 8000–8999Assigned TELNYX LLC 073H KIRKLAND 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.