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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2006-09-01 253-375-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J GRAHAM WA
2006-09-01 253-375-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J GRAHAM WA
2006-09-01 253-446-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2006-09-01 253-446-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2006-08-31 253-507-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-31 253-507-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-31 253-778-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2006-08-28 253-736-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 AUBURN WA
2006-08-17 253-876-6XXX 6000–6999Assigned QWEST CORPORATION 9638 AUBURN WA
2006-08-16 253-389-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-08-16 253-389-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-08-16 253-389-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-08-16 253-389-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-08-16 253-389-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-08-16 253-389-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2006-08-16 253-507-1XXX 1000–1999Assigned RAINIER CONNECT, INC. - WA 7720 TACOMA WA
2006-08-10 253-514-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2006-08-09 253-330-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-09 253-330-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-08 253-736-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2006-08-08 253-736-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2006-08-04 253-353-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-04 253-353-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-04 253-353-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-04 253-507-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-08-03 253-765-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F DES MOINES WA
2006-07-19 253-248-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F TACOMAWVLY WA
2006-07-19 253-561-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - WA 006F AUBURN WA
2006-07-14 253-268-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E PUYALLUP WA
2006-07-14 253-330-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-07-14 253-330-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-07-14 253-330-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-07-14 253-330-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-07-12 253-737-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J AUBURN WA
2006-07-12 253-737-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J AUBURN WA
2006-07-07 253-394-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-07-07 253-394-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-07-07 253-561-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-07-05 253-353-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-07-05 253-353-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-07-03 253-353-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMA WA
2006-06-16 253-507-6XXX 6000–6999Assigned METROPCS, INC. 5562 TACOMA WA
2006-06-15 253-517-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2006-06-15 253-517-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2006-06-13 253-262-3XXX 3000–3999Assigned RAINIER CONNECT, INC. - WA 7720 GRAHAM WA
2006-06-13 253-353-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2006-06-13 253-514-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 GIG HARBOR WA
2006-06-09 253-486-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2006-06-01 253-234-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E KENT WA
2006-06-01 253-248-0XXX 0000–0999Assigned ONVOY, LLC - WA 483E TACOMAWVLY 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.