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
2005-01-14 206-388-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2005-01-14 206-801-0XXX 0000–0999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 RICHMNDBCH WA
2005-01-05 206-257-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2004-12-17 206-407-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-12-14 206-788-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2004-11-17 206-330-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-331-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-359-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-359-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-359-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-366-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-407-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-407-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-407-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-407-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-11-17 206-407-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-326-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-331-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-697-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-697-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-697-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-697-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-697-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-697-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-27 206-697-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-14 206-326-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-10-07 206-326-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-10-07 206-330-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-10-04 206-788-3XXX 3000–3999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2004-09-23 206-326-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-09-03 206-259-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 VASHON WA
2004-09-01 206-331-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-08-31 206-245-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2004-08-31 206-245-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2004-08-31 206-245-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2004-08-31 206-245-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2004-08-31 206-245-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2004-08-31 206-245-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2004-08-17 206-245-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-08-04 206-245-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2004-07-13 206-245-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-06-07 206-838-9XXX 9000–9999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2004-04-22 206-388-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-04-05 206-388-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-04-05 206-407-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-02-20 206-331-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 SEATTLE WA
2004-02-17 206-388-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2004-02-02 206-744-0XXX 0000–0999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2004-02-02 206-744-1XXX 1000–1999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 SEATTLE WA
2004-02-02 206-744-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 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.