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
2020-12-23 425-494-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-12-22 425-520-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-22 425-520-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-22 425-520-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-18 425-439-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2020-12-16 425-532-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-16 425-532-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-16 425-532-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-07 425-470-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2020-12-07 425-470-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2020-12-04 425-439-7XXX 7000–7999Assigned TELNYX LLC 073H BOTHELL WA
2020-12-04 425-515-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-04 425-515-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-04 425-532-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-12-04 425-532-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2020-11-25 425-906-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F MAPLE VLY WA
2020-11-13 425-276-0XXX 0000–0999Assigned TELNYX LLC 073H RENTON WA
2020-11-13 425-307-0XXX 0000–0999Assigned TELNYX LLC 073H KIRKLAND WA
2020-11-13 425-470-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E EVERETT WA
2020-11-13 425-470-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E EVERETT WA
2020-11-13 425-470-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E EVERETT WA
2020-11-13 425-522-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2020-11-13 425-522-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2020-11-13 425-522-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E KIRKLAND WA
2020-11-12 425-264-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E RENTON WA
2020-11-12 425-272-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E RENTON WA
2020-11-12 425-496-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E RENTON WA
2020-10-29 425-532-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2020-10-29 425-532-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2020-10-29 425-532-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2020-10-23 425-572-7XXX 7000–7999Assigned METROPCS, INC. 5562 RENTON WA
2020-10-23 425-981-0XXX 0000–0999Assigned METROPCS, INC. 5562 RENTON WA
2020-10-23 425-981-7XXX 7000–7999Assigned METROPCS, INC. 5562 RENTON WA
2020-10-22 425-470-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2020-10-22 425-470-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2020-10-21 425-371-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2020-10-21 425-371-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2020-10-21 425-873-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2020-10-21 425-873-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2020-10-20 425-477-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-10-20 425-477-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ISSAQUAH WA
2020-10-20 425-510-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2020-10-20 425-510-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E HALLS LAKE WA
2020-10-12 425-477-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F ISSAQUAH WA
2020-10-06 425-532-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2020-10-02 425-510-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-10-02 425-510-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-10-02 425-510-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2020-10-02 425-666-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2020-10-02 425-666-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J EVERETT 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.