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
2016-05-23 425-690-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-23 425-690-9XXX 9000–9999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 RENTON WA
2016-05-19 425-426-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-05-19 425-426-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-05-16 425-240-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-05-06 425-375-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-05-06 425-553-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-05-06 425-553-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-05-06 425-606-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 ISSAQUAH WA
2016-05-04 425-215-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2016-05-04 425-215-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BOTHELL WA
2016-05-03 425-230-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BELLEVUE WA
2016-04-29 425-230-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2016-04-29 425-230-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2016-04-29 425-525-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-04-29 425-525-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-04-27 425-230-8XXX 8000–8999Assigned HD CARRIER LLC 321J BELLEVUE WA
2016-04-27 425-230-9XXX 9000–9999Assigned HD CARRIER LLC 321J BELLEVUE WA
2016-04-27 425-399-9XXX 9000–9999Assigned HD CARRIER LLC 321J SILVERLAKE WA
2016-04-27 425-585-5XXX 5000–5999Assigned HD CARRIER LLC 321J SILVERLAKE WA
2016-04-26 425-230-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2016-04-26 425-230-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E BELLEVUE WA
2016-04-12 425-375-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BOTHELL WA
2016-04-08 425-677-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 ISSAQUAH WA
2016-04-05 425-651-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ISSAQUAH WA
2016-03-30 425-599-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2016-03-30 425-599-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 HALLS LAKE WA
2016-03-17 425-375-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BOTHELL WA
2016-03-17 425-426-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2016-03-17 425-625-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 BELLEVUE WA
2016-03-17 425-626-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 EVERETT WA
2016-03-15 425-524-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-03-15 425-524-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 RENTON WA
2016-03-15 425-626-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-03-15 425-626-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 EVERETT WA
2016-03-14 425-375-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2016-03-14 425-375-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BOTHELL WA
2016-03-14 425-553-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KIRKLAND WA
2016-03-10 425-230-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BELLEVUE WA
2016-03-10 425-230-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BELLEVUE WA
2016-03-10 425-230-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BELLEVUE WA
2016-03-08 425-375-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BOTHELL WA
2016-03-08 425-375-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BOTHELL WA
2016-03-08 425-390-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E 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.