NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

7 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 574
OPENTACT INC. 4
PEERLESS NETWORK OF INDIANA, LLC - IN 1
ONVOY, LLC - IN 1
MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 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
2012-03-30 574-303-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-03-16 574-891-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 DUNLAP IN
2012-03-09 574-222-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-03-09 574-222-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-03-09 574-222-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-03-05 574-326-6XXX 6000–6999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2012-03-02 574-400-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SOUTH BEND IN
2012-02-29 574-349-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GOSHEN IN
2012-02-28 574-326-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2012-02-13 574-549-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 WARSAW IN
2012-01-30 574-742-4XXX 4000–4999Assigned ONVOY, LLC - IN 097D OSCEOLA IN
2012-01-27 574-328-3XXX 3000–3999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 BURKET IN
2012-01-27 574-635-3XXX 3000–3999Assigned ONVOY, LLC - IN 097D CULVER IN
2012-01-18 574-992-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
2012-01-17 574-222-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-01-17 574-222-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-01-17 574-222-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-01-03 574-316-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PLYMOUTH IN
2011-12-06 574-742-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 OSCEOLA IN
2011-11-28 574-297-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MONTICELLO IN
2011-11-16 574-201-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER IN
2011-11-16 574-201-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCHESTER IN
2011-11-08 574-889-7XXX 7000–7999Assigned PEERLESS NETWORK OF INDIANA, LLC - IN 279F LUCERNE IN
2011-10-28 574-349-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 GOSHEN IN
2011-10-20 574-707-8XXX 8000–8999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 OSCEOLA IN
2011-10-18 574-326-8XXX 8000–8999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2011-10-11 574-279-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WALKERTON IN
2011-09-29 574-222-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2011-09-29 574-326-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2011-09-28 574-549-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARSAW IN
2011-09-13 574-516-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
2011-09-09 574-222-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2011-09-01 574-326-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2011-08-24 574-400-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SOUTH BEND IN
2011-08-15 574-326-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2011-08-11 574-400-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2011-08-10 574-400-0XXX 0000–0999Assigned COMCAST IP PHONE, LLC 318J SOUTH BEND IN
2011-07-25 574-326-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2011-07-25 574-326-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2011-07-18 574-635-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F CULVER IN
2011-07-18 574-742-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F OSCEOLA IN
2011-07-08 574-847-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ROCHESTER IN
2011-06-27 574-635-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F CULVER IN
2011-06-27 574-742-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F OSCEOLA IN
2011-06-21 574-575-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2011-06-17 574-549-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARSAW IN
2011-06-16 574-290-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KEWANNA IN
2011-06-15 574-245-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2011-06-07 574-355-3XXX 3000–3999Assigned PEERLESS NETWORK OF INDIANA, LLC - IN 279F LOGANSPORT IN
2011-06-02 574-222-1XXX 1000–1999Assigned PAETEC ITEL, LLC 829J SOUTH BEND IN

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.