NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

22 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 224
NEW CINGULAR WIRELESS PCS, LLC - IL 11
ONVOY, LLC 6
VERSATEL LLC 1
INTRADO COMMUNICATIONS, LLC 1
EXIANT 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
Clear Download CSV ↓
Recent thousands-block assignments
AssignedThousands-blockLast 4 digitsStatusAssigneeOCNRate centerState
2007-10-01 224-548-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-10-01 224-548-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-10-01 224-795-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-09-28 224-425-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 ARLIGTNHTS IL
2007-09-28 224-532-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WHEELING IL
2007-09-18 224-399-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2007-09-14 224-567-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J DESPLAINES IL
2007-09-14 224-637-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2007-09-14 224-678-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALGONQUIN IL
2007-09-14 224-678-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ALGONQUIN IL
2007-09-14 224-856-4XXX 4000–4999Assigned PAETEC ITEL, LLC 829J ELGIN IL
2007-09-14 224-856-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J ELGIN IL
2007-09-13 224-422-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IL 6333 DESPLAINES IL
2007-09-13 224-623-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 ALGONQUIN IL
2007-09-07 224-374-1XXX 1000–1999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 NORTHBROOK IL
2007-09-05 224-425-4XXX 4000–4999Assigned ONVOY, LLC 224C ARLIGTNHTS IL
2007-08-30 224-616-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 GLENVIEW IL
2007-08-29 224-565-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-29 224-565-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-29 224-565-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-29 224-565-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-29 224-565-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-28 224-565-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-28 224-565-6XXX 6000–6999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-28 224-565-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-28 224-565-8XXX 8000–8999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL
2007-08-28 224-656-7XXX 7000–7999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2007-08-28 224-656-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 WAUKEGAN IL
2007-08-27 224-321-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUKEGAN IL
2007-08-27 224-399-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WAUKEGAN IL
2007-08-27 224-699-9XXX 9000–9999Assigned COMCAST IP PHONE, LLC 318J DUNDEE IL
2007-08-10 224-655-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IL 6115 BARRINGTON IL
2007-08-02 224-338-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J ROUND LAKE IL
2007-08-02 224-465-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-08-02 224-465-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-08-02 224-465-2XXX 2000–2999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-08-02 224-465-3XXX 3000–3999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-08-02 224-465-4XXX 4000–4999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-08-02 224-465-5XXX 5000–5999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-07-23 224-544-7XXX 7000–7999Assigned ILLINOIS BELL TEL CO 9329 LAKEFOREST IL
2007-07-23 224-552-2XXX 2000–2999Assigned ILLINOIS BELL TEL CO 9329 LAKEFOREST IL
2007-07-23 224-552-3XXX 3000–3999Assigned ILLINOIS BELL TEL CO 9329 LAKEFOREST IL
2007-07-23 224-552-4XXX 4000–4999Assigned ILLINOIS BELL TEL CO 9329 LAKEFOREST IL
2007-07-23 224-552-6XXX 6000–6999Assigned ILLINOIS BELL TEL CO 9329 LAKEFOREST IL
2007-07-23 224-552-7XXX 7000–7999Assigned ILLINOIS BELL TEL CO 9329 LAKEFOREST IL
2007-07-20 224-372-7XXX 7000–7999Assigned COMCAST IP PHONE, LLC 318J LAKE VILLA IL
2007-07-16 224-764-2XXX 2000–2999Assigned RCN TELECOM SERVICES OF ILLINIOS, INC. - IL 8702 ARLIGTNHTS IL
2007-07-12 224-425-0XXX 0000–0999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-07-12 224-425-9XXX 9000–9999Assigned T-MOBILE USA, INC. 6529 ARLIGTNHTS IL
2007-07-12 224-645-1XXX 1000–1999Assigned T-MOBILE USA, INC. 6529 NORTHBROOK IL

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.