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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2011-03-02 206-496-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2011-03-02 206-496-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2011-02-09 206-687-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2011-01-25 206-430-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2011-01-25 206-743-3XXX 3000–3999Assigned IP HORIZON LLC 515J SEATTLE WA
2011-01-12 206-430-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2011-01-12 206-430-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2011-01-12 206-430-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2011-01-11 206-430-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2011-01-11 206-430-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2010-12-30 206-743-0XXX 0000–0999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SEATTLE WA
2010-12-22 206-430-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-12-13 206-317-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2010-12-10 206-495-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-12-10 206-673-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-12-10 206-673-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-12-10 206-687-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-12-07 206-430-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-12-07 206-430-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-11-22 206-504-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-11-22 206-504-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-11-05 206-456-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-11-05 206-456-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-11-03 206-466-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2010-11-03 206-466-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2010-10-29 206-765-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-10-29 206-765-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-10-29 206-765-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-10-29 206-765-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-10-29 206-765-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-10-27 206-504-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-10-27 206-504-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-10-27 206-504-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-10-27 206-745-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RICHMNDBCH WA
2010-10-21 206-504-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2010-10-20 206-745-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F RICHMNDBCH WA
2010-10-19 206-249-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2010-10-19 206-249-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2010-10-19 206-317-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F BAINBDG IS WA
2010-10-19 206-429-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2010-10-19 206-504-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-10-19 206-504-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-10-19 206-504-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2010-10-05 206-430-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SEATTLE WA
2010-09-29 206-629-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J RICHMNDBCH WA
2010-09-24 206-456-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-09-24 206-456-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2010-09-24 206-687-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-09-24 206-765-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2010-09-16 206-257-1XXX 1000–1999Assigned 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.