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
2013-07-15 206-965-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2013-06-24 206-258-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2013-06-24 206-258-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2013-06-07 206-258-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2013-06-07 206-258-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2013-06-07 206-477-5XXX 5000–5999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-7XXX 7000–7999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-8XXX 8000–8999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-07 206-477-9XXX 9000–9999Assigned QWEST CORPORATION 9638 SEATTLE WA
2013-06-06 206-602-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2013-06-06 206-602-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2013-06-06 206-602-6XXX 6000–6999Assigned ASTOUND BROADBAND, LLC - WA 937F SEATTLE WA
2013-06-06 206-602-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2013-05-23 206-602-8XXX 8000–8999Assigned METROPCS, INC. 5562 SEATTLE WA
2013-05-15 206-258-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2013-05-15 206-258-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2013-05-15 206-258-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2013-05-15 206-602-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2013-05-09 206-602-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2013-05-09 206-602-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2013-05-06 206-489-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SEATTLE WA
2013-04-30 206-489-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2013-04-26 206-489-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2013-04-23 206-489-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2013-04-16 206-489-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2013-04-16 206-489-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2013-04-10 206-496-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2013-04-09 206-557-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2013-04-01 206-557-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2013-03-20 206-317-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2013-03-20 206-429-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2013-03-14 206-347-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BAINBDG IS WA
2013-03-07 206-557-5XXX 5000–5999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SEATTLE WA
2013-02-22 206-489-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2013-02-22 206-489-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2013-02-15 206-858-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2013-02-11 206-651-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DES MOINES WA
2013-02-01 206-858-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J SEATTLE WA
2013-02-01 206-858-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SEATTLE WA
2013-02-01 206-858-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SEATTLE WA
2013-02-01 206-858-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SEATTLE WA
2013-01-16 206-557-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2012-12-20 206-489-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2012-12-20 206-489-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2012-12-18 206-557-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2012-12-18 206-557-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2012-12-12 206-735-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2012-12-12 206-735-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2012-12-12 206-735-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 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.