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
2019-01-08 253-993-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2018-11-06 253-251-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 PUYALLUP WA
2018-10-23 253-527-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2018-10-23 253-527-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2018-10-16 253-243-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KENT WA
2018-10-16 253-884-8XXX 8000–8999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F GIG HARBOR WA
2018-10-09 253-470-2XXX 2000–2999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F SUMNER WA
2018-10-09 253-904-3XXX 3000–3999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F PUYALLUP WA
2018-10-09 253-993-1XXX 1000–1999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F TACOMAWVLY WA
2018-10-08 253-290-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2018-10-08 253-290-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2018-10-08 253-290-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2018-10-08 253-993-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2018-09-25 253-993-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 TACOMAWVLY WA
2018-09-21 253-785-1XXX 1000–1999Assigned METROPCS, INC. 5562 DES MOINES WA
2018-09-21 253-981-2XXX 2000–2999Assigned METROPCS, INC. 5562 KENT WA
2018-09-21 253-993-7XXX 7000–7999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2018-09-19 253-409-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2018-09-07 253-300-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2018-08-29 253-470-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J SUMNER WA
2018-08-29 253-999-4XXX 4000–4999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMA WA
2018-08-29 253-999-6XXX 6000–6999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMA WA
2018-08-23 253-999-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2018-08-17 253-697-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2018-07-16 253-999-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2018-07-13 253-210-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM WA
2018-07-13 253-981-5XXX 5000–5999Assigned METROPCS, INC. 5562 KENT WA
2018-06-15 253-525-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 GIG HARBOR WA
2018-06-07 253-656-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2018-05-14 253-265-4XXX 4000–4999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F GIG HARBOR WA
2018-05-14 253-300-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2018-04-27 253-843-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F ROY WA
2018-04-06 253-525-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 GIG HARBOR WA
2018-04-05 253-993-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2018-04-05 253-993-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMAWVLY WA
2018-04-02 253-987-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUMNER WA
2018-04-02 253-987-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 SUMNER WA
2018-03-21 253-290-4XXX 4000–4999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2018-03-21 253-290-5XXX 5000–5999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2018-03-21 253-290-6XXX 6000–6999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2018-03-19 253-501-8XXX 8000–8999Assigned ASTOUND BROADBAND, LLC - WA 937F SUMNER WA
2018-03-16 253-649-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2018-03-14 253-750-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SUMNER WA
2018-03-13 253-290-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2018-03-13 253-290-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2018-03-13 253-290-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2018-03-07 253-300-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2018-03-07 253-300-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2018-02-14 253-780-7XXX 7000–7999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F GRAHAM WA
2018-02-09 253-375-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GRAHAM 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.