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
2015-07-13 253-656-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2015-07-09 253-533-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 TACOMA WA
2015-06-15 253-457-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-06-15 253-457-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-06-15 253-457-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-06-09 253-243-9XXX 9000–9999Assigned PEERLESS NETWORK OF WASHINGTON, LLC - WA 159F KENT WA
2015-05-29 253-533-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TACOMA WA
2015-05-29 253-943-6XXX 6000–6999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J TACOMAWVLY WA
2015-05-28 253-478-0XXX 0000–0999Assigned METROPCS, INC. 5562 KENT WA
2015-05-27 253-245-2XXX 2000–2999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J AUBURN WA
2015-05-27 253-268-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J PUYALLUP WA
2015-05-27 253-478-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J KENT WA
2015-05-27 253-652-7XXX 7000–7999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J DES MOINES WA
2015-05-27 253-750-8XXX 8000–8999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J SUMNER WA
2015-05-27 253-780-3XXX 3000–3999Assigned CENTURYLINK COMMUNICATIONS, LLC 508J GRAHAM WA
2015-05-21 253-844-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-05-18 253-844-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 TACOMA WA
2015-05-12 253-345-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-05-12 253-345-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-05-12 253-345-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-05-12 253-345-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMAWVLY WA
2015-05-12 253-533-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-05-11 253-268-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-05-11 253-268-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-05-07 253-345-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2015-05-07 253-753-9XXX 9000–9999Assigned ONVOY, LLC - WA 483E TACOMA WA
2015-04-23 253-246-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2015-04-23 253-831-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J TACOMAWVLY WA
2015-04-22 253-750-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J SUMNER WA
2015-04-09 253-258-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-04-09 253-455-1XXX 1000–1999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2015-03-09 253-455-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-03-09 253-455-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-03-06 253-766-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 KENT WA
2015-03-05 253-213-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2015-03-02 253-256-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 PUYALLUP WA
2015-02-19 253-258-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-02-19 253-258-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-02-19 253-258-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2015-02-11 253-252-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2015-02-11 253-252-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2015-02-11 253-640-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 TACOMAWVLY WA
2015-02-10 253-455-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E AUBURN WA
2015-02-05 253-248-3XXX 3000–3999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2015-02-05 253-248-5XXX 5000–5999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2015-02-05 253-248-9XXX 9000–9999Assigned METROPCS, INC. 5562 TACOMAWVLY WA
2015-02-04 253-243-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2014-12-23 253-258-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 AUBURN WA
2014-12-11 253-258-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2014-12-11 253-258-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 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.