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
2016-02-22 253-480-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E KENT WA
2016-02-17 253-289-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E AUBURN WA
2016-02-17 253-289-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E AUBURN WA
2016-02-16 253-236-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2016-02-11 253-289-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E AUBURN WA
2016-02-05 253-289-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2016-02-02 253-433-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2016-02-01 253-260-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E TACOMA WA
2016-02-01 253-289-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E AUBURN WA
2016-02-01 253-313-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2016-02-01 253-387-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2016-02-01 253-392-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2016-02-01 253-750-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E SUMNER WA
2016-01-21 253-289-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2016-01-21 253-433-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-01-21 253-433-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-01-20 253-392-0XXX 0000–0999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2016-01-15 253-260-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2016-01-15 253-260-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2016-01-15 253-263-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2016-01-14 253-372-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2016-01-14 253-372-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2016-01-14 253-652-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2016-01-14 253-652-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2016-01-14 253-881-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F PUYALLUP WA
2016-01-13 253-392-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2016-01-08 253-231-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2016-01-07 253-256-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2016-01-07 253-268-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-12-18 253-284-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-12-18 253-441-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-12-18 253-844-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2015-12-16 253-499-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2015-12-10 253-528-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2015-12-09 253-242-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-12-09 253-263-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-12-09 253-263-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-12-09 253-517-0XXX 0000–0999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2015-12-09 253-719-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-12-09 253-844-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-12-09 253-924-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-12-04 253-263-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-11-24 253-449-6XXX 6000–6999Assigned METROPCS, INC. 5562 DES MOINES WA
2015-11-24 253-449-7XXX 7000–7999Assigned METROPCS, INC. 5562 DES MOINES WA
2015-11-23 253-201-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-3XXX 3000–3999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-11-23 253-201-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E 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.