NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

6 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 313
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 4
OPENTACT INC. 1
INTRADO COMMUNICATIONS, LLC 1
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
2006-09-27 313-784-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-828-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2006-09-27 313-828-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2006-09-27 313-828-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2006-09-27 313-879-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-879-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-879-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-974-0XXX 0000–0999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-974-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-974-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-989-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-989-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-989-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-989-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-26 313-615-2XXX 2000–2999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 DETROITZN6 MI
2006-09-26 313-615-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7279 DETROITZN6 MI
2006-09-22 313-633-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2006-09-22 313-633-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2006-09-22 313-826-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DETROITZN3 MI
2006-09-22 313-826-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DETROITZN3 MI
2006-09-07 313-651-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN4 MI
2006-09-07 313-651-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN4 MI
2006-08-15 313-924-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN2 MI
2006-08-15 313-924-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN2 MI
2006-08-15 313-924-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN2 MI
2006-08-07 313-324-8XXX 8000–8999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 DETROITZN1 MI
2006-08-07 313-359-8XXX 8000–8999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 DETROITZN6 MI
2006-08-07 313-365-3XXX 3000–3999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 DETROITZN3 MI
2006-08-07 313-651-8XXX 8000–8999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 DETROITZN4 MI
2006-08-07 313-676-4XXX 4000–4999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 DETROITZN5 MI
2006-08-07 313-821-7XXX 7000–7999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 DETROITZN2 MI
2006-07-18 313-739-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-18 313-772-0XXX 0000–0999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-18 313-772-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-18 313-772-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-18 313-772-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-18 313-915-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-18 313-915-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-18 313-915-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-07-17 313-221-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-07-17 313-742-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-07-17 313-742-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-07-17 313-742-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-07-17 313-742-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-07-17 313-748-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2006-07-17 313-748-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2006-07-17 313-748-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2006-07-17 313-748-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 DETROITZN1 MI
2006-07-06 313-523-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 DETROITZN6 MI
2006-07-06 313-662-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN5 MI

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.