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
2007-02-06 313-686-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2007-02-06 313-686-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN5 MI
2007-02-06 313-758-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-02-06 313-758-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-02-06 313-918-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-02-06 313-918-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-31 313-344-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2007-01-31 313-344-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C DETROITZN2 MI
2007-01-31 313-454-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN3 MI
2007-01-31 313-583-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2007-01-31 313-583-4XXX 4000–4999Assigned ONVOY, LLCV - MI 543C DETROITZN6 MI
2007-01-31 313-659-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN4 MI
2007-01-30 313-243-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-334-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2007-01-30 313-346-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2007-01-30 313-425-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-471-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-30 313-483-2XXX 2000–2999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-30 313-656-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-30 313-656-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-30 313-656-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-30 313-721-3XXX 3000–3999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-721-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-721-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-721-7XXX 7000–7999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-721-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-736-0XXX 0000–0999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-736-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-736-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-736-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-739-0XXX 0000–0999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-739-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-739-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-739-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN4 MI
2007-01-30 313-768-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-768-6XXX 6000–6999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-768-8XXX 8000–8999Assigned METROPCS, INC. 5562 DETROITZN6 MI
2007-01-30 313-826-4XXX 4000–4999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2007-01-30 313-826-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2007-01-30 313-826-9XXX 9000–9999Assigned METROPCS, INC. 5562 DETROITZN3 MI
2007-01-30 313-974-1XXX 1000–1999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-30 313-974-5XXX 5000–5999Assigned METROPCS, INC. 5562 DETROITZN1 MI
2007-01-24 313-766-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J DETROITZN5 MI
2007-01-24 313-766-6XXX 6000–6999Assigned COMCAST IP PHONE, LLC 318J DETROITZN5 MI
2007-01-24 313-766-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J DETROITZN5 MI
2007-01-22 313-285-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2007-01-22 313-285-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2007-01-22 313-285-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C DETROITZN1 MI
2007-01-08 313-340-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 MI
2007-01-08 313-397-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J DETROITZN4 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.