NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 253
EXIANT COMMUNICATIONS LLC 2
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
2015-11-23 253-201-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-20 253-252-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2015-11-17 253-286-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-11-17 253-286-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-11-17 253-844-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-11-17 253-844-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-11-11 253-239-7XXX 7000–7999Assigned METROPCS, INC. 5562 KENT WA
2015-11-11 253-239-8XXX 8000–8999Assigned METROPCS, INC. 5562 KENT WA
2015-11-11 253-263-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E AUBURN WA
2015-11-10 253-533-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2015-11-10 253-533-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2015-11-10 253-533-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2015-10-30 253-263-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F AUBURN WA
2015-10-29 253-478-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2015-10-14 253-263-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-10-14 253-263-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-10-14 253-263-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-10-09 253-719-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-10-01 253-533-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMA WA
2015-09-22 253-215-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ROY WA
2015-09-22 253-321-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SUMNER WA
2015-09-22 253-449-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F DES MOINES WA
2015-09-17 253-432-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GIG HARBOR WA
2015-09-15 253-499-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KENT WA
2015-09-14 253-293-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-09-14 253-457-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-09-14 253-457-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-09-14 253-457-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-09-14 253-457-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-09-10 253-465-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E ROY WA
2015-09-10 253-465-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E ROY WA
2015-09-10 253-656-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2015-09-09 253-231-2XXX 2000–2999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2015-09-08 253-533-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-09-08 253-533-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-09-08 253-533-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-08-24 253-604-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-08-24 253-604-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-07-30 253-457-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-07-30 253-457-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-07-30 253-457-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-07-24 253-844-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-07-24 253-844-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-07-24 253-844-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-07-24 253-844-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-07-20 253-446-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2015-07-15 253-246-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J KENT 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.