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
2017-06-13 206-231-2XXX 2000–2999Assigned QWEST CORPORATION 9638 DES MOINES WA
2017-06-13 206-231-3XXX 3000–3999Assigned QWEST CORPORATION 9638 DES MOINES WA
2017-06-13 206-231-4XXX 4000–4999Assigned QWEST CORPORATION 9638 DES MOINES WA
2017-06-09 206-480-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-09 206-480-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-09 206-480-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-09 206-480-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-07 206-573-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-07 206-592-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2017-06-07 206-620-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-07 206-620-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-07 206-620-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-07 206-620-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-06-07 206-620-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2017-05-12 206-620-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2017-05-02 206-751-1XXX 1000–1999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2017-04-26 206-929-7XXX 7000–7999Assigned ASTOUND BROADBAND, LLC - WA 937F DES MOINES WA
2017-04-20 206-502-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BAINBDG IS WA
2017-04-14 206-751-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-04-14 206-751-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-04-14 206-751-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-04-14 206-751-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-04-04 206-887-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BAINBDG IS WA
2017-03-21 206-460-4XXX 4000–4999Assigned METROPCS, INC. 5562 DES MOINES WA
2017-03-21 206-712-8XXX 8000–8999Assigned METROPCS, INC. 5562 SEATTLE WA
2017-03-21 206-751-0XXX 0000–0999Assigned METROPCS, INC. 5562 SEATTLE WA
2017-03-15 206-620-0XXX 0000–0999Assigned VONAGE AMERICA LLC 197D SEATTLE WA
2017-03-15 206-620-1XXX 1000–1999Assigned VONAGE AMERICA LLC 197D SEATTLE WA
2017-03-15 206-620-2XXX 2000–2999Assigned VONAGE AMERICA LLC 197D SEATTLE WA
2017-03-13 206-751-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-13 206-751-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-13 206-751-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-08 206-588-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-08 206-712-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-03-02 206-712-3XXX 3000–3999Assigned METROPCS, INC. 5562 SEATTLE WA
2017-03-02 206-712-4XXX 4000–4999Assigned METROPCS, INC. 5562 SEATTLE WA
2017-02-17 206-712-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SEATTLE WA
2017-02-17 206-712-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SEATTLE WA
2017-01-31 206-712-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2017-01-31 206-712-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2017-01-31 206-929-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2017-01-31 206-929-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2016-12-21 206-712-0XXX 0000–0999Assigned METROPCS, INC. 5562 SEATTLE WA
2016-12-21 206-712-9XXX 9000–9999Assigned METROPCS, INC. 5562 SEATTLE WA
2016-12-13 206-503-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-12-13 206-503-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-12-13 206-503-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-12-13 206-503-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-12-13 206-503-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2016-12-06 206-503-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J 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.