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
2008-12-11 253-365-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-12-02 253-234-6XXX 6000–6999Assigned QWEST CORPORATION 9638 KENT WA
2008-11-25 253-293-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 AUBURN WA
2008-11-25 253-509-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 GIG HARBOR WA
2008-11-10 253-466-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J PUYALLUP WA
2008-11-06 253-365-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-10-29 253-655-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J GRAHAM WA
2008-10-29 253-987-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J SUMNER WA
2008-10-28 253-365-6XXX 6000–6999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
2008-10-20 253-293-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2008-10-20 253-293-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2008-10-03 253-220-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC 7229 KENT WA
2008-09-26 253-398-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 KENT WA
2008-09-18 253-324-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-327-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-327-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-355-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-355-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-365-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-365-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-18 253-365-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-09-11 253-293-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2008-09-08 253-327-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-08-27 253-327-2XXX 2000–2999Assigned ELECTRIC LIGHTWAVE LLC DBA ALLSTREAM 7173 TACOMA WA
2008-08-08 253-303-7XXX 7000–7999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2008-07-29 253-314-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J TACOMA WA
2008-07-16 253-237-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 DES MOINES WA
2008-07-16 253-693-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - WA 6121 PUYALLUP WA
2008-07-11 253-355-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-07-09 253-365-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-07-09 253-365-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-07-09 253-365-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC 6010 TACOMA WA
2008-07-08 253-249-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J AUBURN WA
2008-06-26 253-235-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2008-06-26 253-235-2XXX 2000–2999Assigned ONVOY, LLC - WA 483E TACOMAWVLY WA
2008-06-18 253-293-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2008-06-17 253-236-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J KENT WA
2008-06-16 253-326-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 AUBURN WA
2008-06-13 253-355-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-06-13 253-355-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 TACOMA WA
2008-06-10 253-326-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - WA 5812 AUBURN WA
2008-06-06 253-355-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 TACOMA WA
2008-06-05 253-303-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2008-06-05 253-649-1XXX 1000–1999Assigned ONVOY, LLC - WA 483E GIG HARBOR WA
2008-05-21 253-214-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2008-05-21 253-214-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E DES MOINES WA
2008-05-21 253-326-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E AUBURN WA
2008-05-21 253-326-5XXX 5000–5999Assigned ONVOY, LLC - WA 483E AUBURN WA
2008-04-30 253-216-4XXX 4000–4999Assigned ONVOY, LLC - WA 483E KENT WA
2008-04-30 253-216-6XXX 6000–6999Assigned ONVOY, LLC - WA 483E KENT 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.