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
2011-12-22 425-224-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SILVERLAKE WA
2011-12-22 425-366-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F EVERETT WA
2011-12-22 425-615-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BELLEVUE WA
2011-12-22 425-629-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KIRKLAND WA
2011-12-22 425-908-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2011-12-21 425-366-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E EVERETT WA
2011-12-21 425-892-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2011-12-16 425-366-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 EVERETT WA
2011-12-14 425-892-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2011-12-02 425-633-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2011-11-23 425-429-9XXX 9000–9999Assigned ASTOUND BROADBAND, LLC - WA 937F BELLEVUE WA
2011-11-14 425-615-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-11-14 425-615-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-11-14 425-615-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-11-11 425-658-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KIRKLAND WA
2011-10-19 425-615-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-10-19 425-615-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-10-19 425-615-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-10-12 425-789-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-10-12 425-789-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-10-12 425-789-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-10-03 425-333-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F CARNATION WA
2011-09-29 425-358-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J MAPLE VLY WA
2011-09-19 425-658-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KIRKLAND WA
2011-09-12 425-381-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BOTHELL WA
2011-09-12 425-558-2XXX 2000–2999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 KIRKLAND WA
2011-09-08 425-265-6XXX 6000–6999Assigned ZIPLY FIBER NORTHWEST, LLC DBA ZIPLY FIBER 4324 EVERETT WA
2011-09-02 425-332-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SILVERLAKE WA
2011-09-02 425-404-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J EVERETT WA
2011-09-01 425-429-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BELLEVUE WA
2011-08-31 425-264-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J RENTON WA
2011-08-31 425-286-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2011-08-31 425-658-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J KIRKLAND WA
2011-08-24 425-366-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-08-24 425-366-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-08-24 425-582-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J HALLS LAKE WA
2011-08-23 425-658-2XXX 2000–2999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KIRKLAND WA
2011-08-17 425-615-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-08-17 425-615-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BELLEVUE WA
2011-08-16 425-429-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2011-08-16 425-984-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2011-08-12 425-783-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-08-12 425-905-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 EVERETT WA
2011-08-11 425-369-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2011-08-11 425-409-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 HALLS LAKE WA
2011-08-10 425-429-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2011-08-10 425-429-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2011-08-03 425-312-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-08-03 425-312-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2011-08-03 425-354-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BOTHELL 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.