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
2017-07-05 253-987-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SUMNER WA
2017-04-26 253-240-2XXX 2000–2999Assigned ASTOUND BROADBAND, LLC - WA 937F TACOMA WA
2017-04-26 253-387-0XXX 0000–0999Assigned ASTOUND BROADBAND, LLC - WA 937F PUYALLUP WA
2017-04-17 253-331-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2017-04-11 253-499-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2017-04-11 253-904-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2017-03-29 253-331-0XXX 0000–0999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2017-03-29 253-331-9XXX 9000–9999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2017-03-21 253-487-4XXX 4000–4999Assigned METROPCS, INC. 5562 KENT WA
2017-03-21 253-765-3XXX 3000–3999Assigned METROPCS, INC. 5562 DES MOINES WA
2017-02-24 253-287-4XXX 4000–4999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TACOMA WA
2017-02-22 253-999-9XXX 9000–9999Assigned TELNYX LLC 073H TACOMA WA
2017-02-08 253-883-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2017-02-07 253-466-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2017-02-01 253-287-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMA WA
2017-02-01 253-987-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SUMNER WA
2017-01-31 253-392-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMAWVLY WA
2016-12-20 253-289-3XXX 3000–3999Assigned TELNYX LLC 073H AUBURN WA
2016-11-24 253-287-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-11-22 253-257-6XXX 6000–6999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2016-11-22 253-765-1XXX 1000–1999Assigned METROPCS, INC. 5562 DES MOINES WA
2016-11-01 253-478-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2016-11-01 253-881-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2016-09-23 253-287-1XXX 1000–1999Assigned METROPCS, INC. 5562 TACOMA WA
2016-09-23 253-287-2XXX 2000–2999Assigned METROPCS, INC. 5562 TACOMA WA
2016-09-14 253-257-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2016-09-13 253-409-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2016-08-24 253-287-0XXX 0000–0999Assigned METROPCS, INC. 5562 TACOMA WA
2016-08-18 253-257-3XXX 3000–3999Assigned HD CARRIER LLC 321J TACOMAWVLY WA
2016-08-18 253-257-4XXX 4000–4999Assigned HD CARRIER LLC 321J TACOMAWVLY WA
2016-08-12 253-287-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-08-12 253-287-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-08-09 253-904-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2016-07-19 253-409-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2016-07-19 253-409-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2016-07-14 253-409-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E AUBURN WA
2016-07-13 253-257-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2016-07-12 253-321-7XXX 7000–7999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - WA 7274 SUMNER WA
2016-07-01 253-409-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F AUBURN WA
2016-06-30 253-240-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2016-06-24 253-387-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2016-06-24 253-487-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2016-06-23 253-257-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMAWVLY WA
2016-06-22 253-655-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F GRAHAM WA
2016-06-22 253-750-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F SUMNER WA
2016-06-15 253-257-0XXX 0000–0999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2016-06-15 253-478-6XXX 6000–6999Assigned METROPCS, INC. 5562 KENT WA
2016-06-14 253-240-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-06-14 253-240-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2016-06-14 253-240-7XXX 7000–7999Assigned 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.