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
2008-04-24 253-604-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2008-04-03 253-719-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2008-03-28 253-353-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-03-28 253-353-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-03-19 253-326-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2008-03-19 253-326-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2008-03-17 253-327-1XXX 1000–1999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMA WA
2008-03-03 253-314-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-03-03 253-327-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-02-22 253-271-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J GRAHAM WA
2008-02-22 253-355-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-02-22 253-355-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-02-22 253-355-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-02-15 253-292-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2008-02-15 253-327-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-02-15 253-327-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-02-14 253-326-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2008-02-14 253-509-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2008-02-14 253-886-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2008-01-31 253-292-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2008-01-31 253-292-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2008-01-23 253-267-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-01-23 253-301-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-01-23 253-301-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-01-23 253-777-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-01-23 253-777-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-01-23 253-777-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-01-22 253-266-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2008-01-22 253-292-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2008-01-17 253-292-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2008-01-17 253-292-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2008-01-17 253-292-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-01-17 253-292-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-01-04 253-313-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2008-01-04 253-509-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2008-01-04 253-649-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2007-12-21 253-266-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2007-11-26 253-341-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-341-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-341-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-341-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-341-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-736-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2007-11-26 253-777-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-777-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-777-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2007-11-26 253-886-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2007-11-26 253-929-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2007-11-14 253-398-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 KENT WA
2007-11-07 253-341-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 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.