NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

6 blocks assigned in the last 30 days · from the daily NANPA thousands-block report, 09/19/2026

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
2007-01-08 313-397-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 MI
2007-01-08 313-397-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 MI
2007-01-04 313-293-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-420-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-424-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-463-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-465-0XXX 0000–0999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-465-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-465-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-465-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-469-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2007-01-04 313-469-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2007-01-04 313-469-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2007-01-04 313-469-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN2 MI
2007-01-04 313-784-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-04 313-974-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-12-19 313-974-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DETROITZN1 MI
2006-12-19 313-974-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DETROITZN1 MI
2006-11-15 313-397-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 MI
2006-11-15 313-397-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 MI
2006-11-15 313-397-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 MI
2006-11-15 313-397-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 MI
2006-11-15 313-914-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2006-11-15 313-914-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2006-11-15 313-914-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2006-11-15 313-914-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2006-11-15 313-914-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DETROITZN6 MI
2006-11-15 313-977-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DETROITZN5 MI
2006-11-14 313-469-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DETROITZN2 MI
2006-11-14 313-469-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DETROITZN2 MI
2006-11-14 313-469-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DETROITZN2 MI
2006-11-14 313-469-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DETROITZN2 MI
2006-11-13 313-722-8XXX 8000–8999Assigned PAETEC ITEL, LLC 829J DETROITZN6 MI
2006-10-20 313-826-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DETROITZN3 MI
2006-10-20 313-826-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DETROITZN3 MI
2006-09-29 313-469-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J DETROITZN2 MI
2006-09-29 313-469-1XXX 1000–1999Assigned COMCAST IP PHONE, LLC 318J DETROITZN2 MI
2006-09-27 313-523-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2006-09-27 313-523-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2006-09-27 313-523-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2006-09-27 313-646-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2006-09-27 313-778-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2006-09-27 313-778-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2006-09-27 313-778-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2006-09-27 313-778-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2006-09-27 313-784-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-784-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-784-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-784-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2006-09-27 313-784-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN1 MI

Source: NANPA Thousands Block Assignment Report (All Regions, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.