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
2017-09-15 206-536-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-09-15 206-536-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-09-15 206-536-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-09-15 206-536-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-09-15 206-536-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-09-15 206-536-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-09-14 206-742-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2017-09-14 206-742-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2017-09-12 206-231-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2017-09-12 206-401-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E RICHMNDBCH WA
2017-09-12 206-408-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E VASHON WA
2017-09-12 206-502-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E BAINBDG IS WA
2017-09-12 206-887-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 BAINBDG IS WA
2017-09-07 206-536-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-09-07 206-536-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-09-07 206-536-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-08-25 206-247-7XXX 7000–7999Assigned PAETEC ITEL, LLC 829J SEATTLE WA
2017-08-14 206-401-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMNDBCH WA
2017-08-14 206-401-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 RICHMNDBCH WA
2017-08-14 206-928-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2017-08-14 206-928-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2017-08-14 206-928-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SEATTLE WA
2017-08-10 206-620-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2017-08-10 206-889-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2017-08-10 206-889-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2017-08-10 206-889-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-08-10 206-889-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2017-08-10 206-889-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-08-10 206-889-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2017-08-10 206-889-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 SEATTLE WA
2017-08-10 206-928-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-08-10 206-928-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-08-09 206-928-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-08-09 206-928-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-08-09 206-928-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-08-09 206-928-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-08-08 206-231-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 DES MOINES WA
2017-07-27 206-376-3XXX 3000–3999Assigned METROPCS, INC. 5562 SEATTLE WA
2017-07-27 206-376-6XXX 6000–6999Assigned METROPCS, INC. 5562 SEATTLE WA
2017-07-20 206-889-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-07-20 206-889-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E SEATTLE WA
2017-07-17 206-928-0XXX 0000–0999Assigned ONVOY SPECTRUM, LLC 624H SEATTLE WA
2017-07-14 206-401-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F RICHMNDBCH WA
2017-07-14 206-480-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SEATTLE WA
2017-07-13 206-480-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 206-480-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 206-480-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 206-480-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 SEATTLE WA
2017-07-13 206-887-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F BAINBDG IS WA
2017-06-15 206-480-0XXX 0000–0999Assigned INTRADO COMMUNICATIONS, LLC 841C 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.