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
2014-01-09 253-391-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2013-12-23 253-883-8XXX 8000–8999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2013-12-23 253-883-9XXX 9000–9999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2013-12-19 253-213-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2013-12-18 253-328-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-12-17 253-252-8XXX 8000–8999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2013-12-17 253-649-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2013-12-16 253-277-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2013-12-13 253-244-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-12-13 253-266-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2013-12-13 253-549-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2013-12-05 253-329-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2013-11-27 253-432-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GIG HARBOR WA
2013-11-06 253-625-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2013-11-05 253-204-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2013-10-30 253-750-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SUMNER WA
2013-10-29 253-204-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2013-10-29 253-204-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2013-10-17 253-244-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMA WA
2013-10-17 253-878-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2013-10-15 253-286-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2013-10-15 253-375-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F GRAHAM WA
2013-10-09 253-754-1XXX 1000–1999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2013-10-09 253-754-2XXX 2000–2999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2013-09-25 253-252-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2013-09-25 253-313-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2013-09-20 253-204-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2013-09-13 253-277-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2013-09-12 253-244-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E TACOMA WA
2013-09-12 253-244-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E TACOMA WA
2013-08-30 253-204-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E AUBURN WA
2013-08-30 253-220-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KENT WA
2013-08-30 253-265-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F GIG HARBOR WA
2013-08-16 253-545-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J AUBURN WA
2013-08-09 253-244-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2013-07-15 253-358-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2013-06-11 253-204-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J AUBURN WA
2013-06-11 253-244-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-06-11 253-244-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-06-06 253-204-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2013-06-06 253-888-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-06-04 253-242-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2013-05-23 253-398-4XXX 4000–4999Assigned METROPCS, INC. 5562 KENT WA
2013-05-23 253-398-5XXX 5000–5999Assigned METROPCS, INC. 5562 KENT WA
2013-05-23 253-652-8XXX 8000–8999Assigned METROPCS, INC. 5562 DES MOINES WA
2013-05-23 253-652-9XXX 9000–9999Assigned METROPCS, INC. 5562 DES MOINES WA
2013-05-23 253-954-7XXX 7000–7999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2013-05-23 253-954-8XXX 8000–8999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2013-05-10 253-382-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2013-05-10 253-625-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA 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.