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
2016-05-19 206-606-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2016-05-13 206-717-0XXX 0000–0999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SEATTLE WA
2016-05-13 206-717-1XXX 1000–1999Assigned METROPCS, INC. 5562 SEATTLE WA
2016-05-11 206-717-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2016-05-11 206-717-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2016-05-11 206-717-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2016-05-05 206-481-0XXX 0000–0999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-1XXX 1000–1999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-2XXX 2000–2999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-4XXX 4000–4999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-7XXX 7000–7999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-05 206-481-9XXX 9000–9999Assigned QWEST CORPORATION 9638 SEATTLE WA
2016-05-04 206-565-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2016-05-04 206-565-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2016-04-27 206-460-6XXX 6000–6999Assigned HD CARRIER LLC 321J DES MOINES WA
2016-04-27 206-460-7XXX 7000–7999Assigned HD CARRIER LLC 321J DES MOINES WA
2016-04-27 206-606-0XXX 0000–0999Assigned HD CARRIER LLC 321J SEATTLE WA
2016-04-27 206-606-9XXX 9000–9999Assigned HD CARRIER LLC 321J SEATTLE WA
2016-04-26 206-823-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2016-04-26 206-823-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2016-04-26 206-823-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2016-04-21 206-485-7XXX 7000–7999Assigned ASTOUND BROADBAND, LLC - WA 937F SEATTLE WA
2016-04-20 206-717-6XXX 6000–6999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SEATTLE WA
2016-04-13 206-717-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2016-04-11 206-408-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J VASHON WA
2016-04-08 206-485-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-08 206-485-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-08 206-485-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-08 206-771-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-08 206-771-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-08 206-771-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-08 206-771-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-08 206-771-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-04-01 206-460-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DES MOINES WA
2016-04-01 206-606-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2016-04-01 206-606-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2016-04-01 206-606-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2016-04-01 206-606-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2016-04-01 206-606-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2016-04-01 206-606-7XXX 7000–7999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2016-04-01 206-606-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2016-03-31 206-485-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SEATTLE WA
2016-03-31 206-717-9XXX 9000–9999Assigned IP HORIZON LLC 515J SEATTLE WA
2016-03-25 206-717-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2016-03-25 206-717-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2016-03-22 206-460-8XXX 8000–8999Assigned METROPCS, INC. 5562 DES MOINES 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.