NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

0 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, all time — NPA 248
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 520
NEW CINGULAR WIRELESS PCS, LLC - IL 384
ONVOY, LLCV - MI 332
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 287
METROPCS, INC. 227
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
2014-10-08 248-657-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2014-10-08 248-657-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 CLARKSTON MI
2014-10-07 248-607-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 ROYAL OAK MI
2014-10-01 248-301-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C COMMERCE MI
2014-10-01 248-532-3XXX 3000–3999Assigned ONVOY, LLCV - MI 543C ORTONVILLE MI
2014-09-30 248-378-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 NORTHVILLE MI
2014-09-30 248-413-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ROCHESTER MI
2014-09-30 248-849-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 SOUTHFIELD MI
2014-09-30 248-973-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C W BLOOMFLD MI
2014-09-30 248-973-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C W BLOOMFLD MI
2014-09-26 248-516-5XXX 5000–5999Assigned AT&T ENTERPRISES, LLC 516C FARMINGTON MI
2014-09-25 248-378-5XXX 5000–5999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2014-09-25 248-378-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 NORTHVILLE MI
2014-09-24 248-378-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C NORTHVILLE MI
2014-09-24 248-378-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C NORTHVILLE MI
2014-09-24 248-450-5XXX 5000–5999Assigned ONVOY, LLCV - MI 543C SOUTHFIELD MI
2014-09-24 248-450-6XXX 6000–6999Assigned ONVOY, LLCV - MI 543C SOUTHFIELD MI
2014-09-24 248-509-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C TROY MI
2014-09-24 248-509-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C TROY MI
2014-09-23 248-480-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C BIRMINGHAM MI
2014-09-23 248-480-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C BIRMINGHAM MI
2014-09-18 248-571-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C ROYAL OAK MI
2014-09-18 248-598-7XXX 7000–7999Assigned ONVOY, LLCV - MI 543C AUBURN HTS MI
2014-09-18 248-598-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C AUBURN HTS MI
2014-09-16 248-587-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C SOUTH LYON MI
2014-09-16 248-986-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C FARMINGTON MI
2014-09-16 248-986-2XXX 2000–2999Assigned ONVOY, LLCV - MI 543C FARMINGTON MI
2014-09-15 248-369-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOLLY MI
2014-09-15 248-369-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOLLY MI
2014-09-15 248-571-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-571-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-15 248-923-8XXX 8000–8999Assigned ONVOY, LLCV - MI 543C ROCHESTER MI
2014-09-15 248-923-9XXX 9000–9999Assigned ONVOY, LLCV - MI 543C ROCHESTER MI
2014-09-15 248-986-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2014-09-15 248-986-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2014-09-15 248-986-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2014-09-15 248-986-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 FARMINGTON MI
2014-09-08 248-657-1XXX 1000–1999Assigned GRID 4 COMMUNICATIONS, INC. - MI 9714 CLARKSTON MI
2014-09-05 248-206-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROYAL OAK MI
2014-09-05 248-550-2XXX 2000–2999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-09-05 248-550-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-09-05 248-550-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM MI
2014-09-05 248-550-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BIRMINGHAM 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.