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
2010-09-16 206-403-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2010-08-23 206-466-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-08-23 206-466-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-08-23 206-466-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-07-16 206-456-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2010-07-16 206-737-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2010-07-16 206-737-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2010-07-09 206-673-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-07-09 206-922-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-07-07 206-456-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-07-01 206-257-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2010-06-23 206-745-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RICHMNDBCH WA
2010-06-16 206-397-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-06-11 206-316-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-06-11 206-316-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-06-11 206-397-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-06-11 206-651-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2010-06-11 206-922-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-05-26 206-592-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DES MOINES WA
2010-05-21 206-397-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-05-21 206-397-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-05-18 206-257-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-04-28 206-257-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2010-04-07 206-257-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-04-07 206-257-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-04-05 206-316-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-04-05 206-316-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-04-05 206-316-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-03-29 206-316-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2010-03-29 206-316-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2010-03-04 206-316-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2010-03-04 206-316-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-03-04 206-922-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-03-01 206-745-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E RICHMNDBCH WA
2010-02-09 206-451-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BAINBDG IS WA
2010-02-09 206-569-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RICHMNDBCH WA
2010-02-09 206-707-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-02-09 206-707-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-01-22 206-395-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-01-22 206-395-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-01-22 206-395-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-01-22 206-395-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-01-22 206-395-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-01-19 206-395-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-01-13 206-707-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-01-13 206-707-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-01-13 206-707-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-01-13 206-707-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-01-04 206-395-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2009-12-18 206-395-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E 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.