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
2014-08-20 206-319-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-08-20 206-866-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-08-19 206-471-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-08-19 206-471-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-08-19 206-471-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-08-18 206-519-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-08-18 206-519-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-08-18 206-939-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-08-14 206-519-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2014-08-14 206-519-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2014-08-01 206-519-3XXX 3000–3999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SEATTLE WA
2014-07-28 206-519-0XXX 0000–0999Assigned METROPCS, INC. 5562 SEATTLE WA
2014-07-28 206-519-1XXX 1000–1999Assigned METROPCS, INC. 5562 SEATTLE WA
2014-07-16 206-556-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-07-09 206-451-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-07-09 206-451-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-07-09 206-451-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 BAINBDG IS WA
2014-07-03 206-519-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-07-03 206-519-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-07-03 206-519-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-06-24 206-556-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-06-24 206-556-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-06-18 206-556-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2014-06-18 206-556-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2014-06-18 206-556-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2014-06-13 206-556-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-06-13 206-556-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-06-11 206-317-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 BAINBDG IS WA
2014-06-11 206-556-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-06-11 206-556-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2014-06-05 206-294-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-06-05 206-294-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-06-05 206-866-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BAINBDG IS WA
2014-06-04 206-294-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2014-06-04 206-294-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2014-05-20 206-294-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SEATTLE WA
2014-05-20 206-294-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-04-25 206-294-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-04-22 206-839-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2014-04-21 206-643-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2014-04-18 206-294-0XXX 0000–0999Assigned METROPCS, INC. 5562 SEATTLE WA
2014-04-18 206-578-0XXX 0000–0999Assigned METROPCS, INC. 5562 DES MOINES WA
2014-04-18 206-578-1XXX 1000–1999Assigned METROPCS, INC. 5562 DES MOINES WA
2014-04-18 206-578-9XXX 9000–9999Assigned METROPCS, INC. 5562 DES MOINES WA
2014-04-18 206-946-0XXX 0000–0999Assigned METROPCS, INC. 5562 SEATTLE WA
2014-04-14 206-946-3XXX 3000–3999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2014-04-14 206-946-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - WA 7146 SEATTLE WA
2014-04-09 206-294-7XXX 7000–7999Assigned LEVEL 3 TELECOM OF WASHINGTON, LLC - WA 7455 SEATTLE WA
2014-04-04 206-597-3XXX 3000–3999Assigned QWEST CORPORATION 9638 SEATTLE WA
2014-04-04 206-597-4XXX 4000–4999Assigned QWEST CORPORATION 9638 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.