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
2006-06-01 253-447-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E SUMNER WA
2006-06-01 253-880-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E AUBURN WA
2006-05-30 253-277-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2006-05-30 253-277-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2006-05-30 253-304-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-05-30 253-495-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-05-26 253-248-8XXX 8000–8999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMAWVLY WA
2006-05-17 253-394-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2006-05-17 253-394-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2006-05-15 253-302-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2006-05-15 253-617-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2006-05-09 253-275-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-05-09 253-315-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-05-08 253-302-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-05-08 253-302-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-05-04 253-604-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2006-05-01 253-302-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2006-05-01 253-302-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2006-05-01 253-302-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2006-04-11 253-298-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-04-07 253-266-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-04-07 253-266-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-04-05 253-298-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-03-22 253-220-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F KENT WA
2006-03-08 253-486-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-03-06 253-298-3XXX 3000–3999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMA WA
2006-03-06 253-298-4XXX 4000–4999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMA WA
2006-03-02 253-298-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-03-02 253-298-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-03-02 253-737-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2006-02-21 253-302-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-02-21 253-302-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-02-21 253-302-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-02-21 253-344-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2006-02-09 253-561-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-01-24 253-508-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2006-01-24 253-508-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2006-01-20 253-298-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-01-20 253-298-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-01-15 253-304-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-15 253-304-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2006-01-11 253-394-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2006-01-11 253-394-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN 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.