NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

5 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2006-07-17 206-971-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-07-17 206-971-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-07-07 206-377-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-07-07 206-398-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-07-07 206-973-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-07-07 206-973-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-07-03 206-420-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SEATTLE WA
2006-07-03 206-420-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2006-06-22 206-859-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-06-22 206-861-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-06-14 206-434-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2006-06-14 206-434-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 SEATTLE WA
2006-06-01 206-816-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-06-01 206-861-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-06-01 206-883-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-05-31 206-212-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2006-05-24 206-906-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2006-05-24 206-913-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2006-05-24 206-922-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2006-05-16 206-438-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-05-16 206-438-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-05-16 206-438-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-05-09 206-370-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-05-09 206-428-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-05-09 206-428-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-04-27 206-422-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2006-04-27 206-422-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2006-04-27 206-422-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2006-04-27 206-434-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2006-04-27 206-434-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2006-04-19 206-375-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-04-19 206-375-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-04-19 206-403-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-04-19 206-403-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-04-19 206-403-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-04-19 206-403-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-04-19 206-830-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-04-11 206-201-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 BAINBDG IS WA
2006-04-11 206-501-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-04-11 206-501-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-04-11 206-501-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-03-28 206-306-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-03-28 206-306-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-03-28 206-359-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2006-03-23 206-905-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-03-23 206-905-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-03-23 206-905-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-03-22 206-905-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-03-22 206-905-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2006-03-22 206-905-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.