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
2013-04-15 253-204-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2013-04-09 253-204-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 AUBURN WA
2013-04-09 253-231-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMAWVLY WA
2013-04-09 253-236-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENT WA
2013-04-03 253-750-6XXX 6000–6999Assigned QWEST CORPORATION 9638 SUMNER WA
2013-03-27 253-204-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E AUBURN WA
2013-02-26 253-681-5XXX 5000–5999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 DES MOINES WA
2013-02-15 253-733-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 DES MOINES WA
2013-02-13 253-625-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-02-13 253-625-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-02-06 253-545-7XXX 7000–7999Assigned QWEST CORPORATION 9638 AUBURN WA
2013-01-11 253-625-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-01-11 253-625-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2013-01-07 253-604-2XXX 2000–2999Assigned PAETEC ITEL, LLC 829J PUYALLUP WA
2012-12-14 253-246-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2012-12-14 253-625-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2012-12-12 253-545-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2012-12-03 253-242-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2012-12-03 253-545-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2012-10-29 253-329-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2012-10-24 253-246-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E KENT WA
2012-10-17 253-545-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2012-10-11 253-442-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-10-11 253-448-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-10-11 253-625-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-10-11 253-625-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-10-11 253-888-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-10-05 253-336-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2012-10-05 253-336-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2012-10-05 253-336-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2012-10-05 253-642-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2012-10-05 253-642-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2012-10-04 253-252-4XXX 4000–4999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMAWVLY WA
2012-09-28 253-442-8XXX 8000–8999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
2012-09-27 253-243-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2012-09-14 253-231-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMAWVLY WA
2012-09-06 253-329-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2012-09-06 253-329-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2012-09-06 253-888-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-09-06 253-888-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-09-06 253-888-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-09-06 253-888-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2012-09-05 253-545-2XXX 2000–2999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-09-05 253-545-3XXX 3000–3999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-09-05 253-545-4XXX 4000–4999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-09-05 253-545-5XXX 5000–5999Assigned QWEST CORPORATION 9638 AUBURN WA
2012-08-30 253-256-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 PUYALLUP WA
2012-08-29 253-329-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2012-08-10 253-329-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2012-07-26 253-358-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR 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.