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
2019-06-27 206-308-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-308-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-308-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-308-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-688-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-688-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-688-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-688-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-27 206-688-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2019-06-25 206-806-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2019-06-25 206-806-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2019-06-20 206-806-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2019-06-19 206-581-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-2XXX 2000–2999Assigned CORETEL WASHINGTON, INC. - WA 453J SEATTLE WA
2019-06-19 206-581-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-581-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-19 206-688-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-06-05 206-591-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J BAINBDG IS WA
2019-05-28 206-806-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2019-05-21 206-688-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2019-05-21 206-688-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2019-05-20 206-591-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-05-20 206-591-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-05-20 206-591-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-05-20 206-591-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-05-20 206-591-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-04-25 206-385-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-25 206-385-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2019-04-22 206-688-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2019-04-22 206-688-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2019-04-18 206-825-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-04-18 206-825-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-04-18 206-825-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-04-18 206-825-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2019-04-16 206-806-9XXX 9000–9999Assigned HD CARRIER LLC 321J SEATTLE WA
2019-04-15 206-581-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-04-15 206-581-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-04-15 206-581-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-04-15 206-581-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2019-04-03 206-562-0XXX 0000–0999Assigned IP HORIZON LLC 515J 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.