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
2005-06-21 253-883-6XXX 6000–6999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 TACOMAWVLY WA
2005-06-20 253-514-4XXX 4000–4999Assigned ASTOUND BROADBAND, LLC - WA 937F GIG HARBOR WA
2005-06-08 253-266-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-06-08 253-954-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2005-06-07 253-249-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-06-07 253-414-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-06-07 253-508-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2005-06-07 253-508-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2005-05-13 253-414-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-05-13 253-656-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENT WA
2005-05-13 253-656-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 KENT WA
2005-05-05 253-514-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2005-05-05 253-514-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2005-04-25 253-212-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-04-12 253-345-6XXX 6000–6999Assigned PAETEC ITEL, LLC 829J TACOMAWVLY WA
2005-04-06 253-486-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-04-06 253-495-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-04-06 253-495-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-04-06 253-495-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-03-31 253-985-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-03-31 253-985-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-03-31 253-985-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-03-31 253-985-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-03-22 253-218-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2005-03-22 253-218-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2005-03-21 253-303-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2005-03-21 253-313-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2005-03-21 253-509-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2005-03-21 253-649-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2005-03-15 253-948-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-03-15 253-948-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-03-15 253-948-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-03-15 253-948-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-03-15 253-985-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2005-03-14 253-414-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2005-03-09 253-514-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J GIG HARBOR WA
2005-02-28 253-218-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2005-02-22 253-444-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-22 253-444-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-22 253-459-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-22 253-459-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-22 253-459-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-22 253-459-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-22 253-459-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-22 253-534-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2005-02-18 253-215-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J ROY WA
2005-02-18 253-446-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2005-02-18 253-617-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E TACOMA WA
2005-02-18 253-617-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2005-02-17 253-426-5XXX 5000–5999Assigned 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.