NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

5 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 206
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 4
ACCELERATE NETWORKS LLC 1
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
2005-03-30 206-973-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2005-03-22 206-788-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-03-22 206-788-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-03-22 206-788-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-03-09 206-257-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-257-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-388-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-388-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-388-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-388-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-403-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-408-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J VASHON WA
2005-03-09 206-437-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-529-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-553-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-658-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-658-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-658-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-661-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-09 206-661-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-03-01 206-201-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J BAINBDG IS WA
2005-03-01 206-403-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-03-01 206-801-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J RICHMNDBCH WA
2005-02-18 206-629-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RICHMNDBCH WA
2005-02-16 206-201-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2005-02-07 206-533-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 RICHMNDBCH WA
2005-02-03 206-529-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2005-02-03 206-529-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2005-02-01 206-257-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2005-02-01 206-370-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-02-01 206-370-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-02-01 206-370-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-02-01 206-494-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2005-02-01 206-494-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2005-02-01 206-494-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2005-01-28 206-388-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2005-01-28 206-801-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RICHMNDBCH WA
2005-01-26 206-661-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-01-26 206-661-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-01-26 206-661-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-01-26 206-661-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-01-26 206-661-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2005-01-21 206-859-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2005-01-17 206-330-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-01-17 206-330-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-01-17 206-330-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-01-17 206-331-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-01-17 206-331-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-01-17 206-331-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2005-01-17 206-375-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE 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.