NumberResearch Membership · Data 09/19/2026

Recent thousands-block assignments

7 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 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
2011-05-25 574-398-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 LOGANSPORT IN
2011-05-17 574-292-9XXX 9000–9999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2011-05-11 574-575-4XXX 4000–4999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ELKHART IN
2011-05-06 574-524-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 ELKHART IN
2011-05-04 574-400-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2011-05-04 574-400-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2011-05-04 574-400-7XXX 7000–7999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2011-05-04 574-400-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2011-04-29 574-891-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 DUNLAP IN
2011-04-04 574-275-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SYRACUSE IN
2011-04-01 574-601-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 LOGANSPORT IN
2011-03-31 574-376-3XXX 3000–3999Assigned METROPCS, INC. 5562 WARSAW IN
2011-03-30 574-208-9XXX 9000–9999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SOUTH BEND IN
2011-03-22 574-353-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J MENTONE IN
2011-03-17 574-400-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 SOUTH BEND IN
2011-03-11 574-575-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ELKHART IN
2011-03-10 574-398-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOGANSPORT IN
2011-03-10 574-598-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J AKRON IN
2011-03-07 574-230-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 KEWANNA IN
2011-02-24 574-943-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J IDAVILLE IN
2011-02-22 574-214-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2011-02-22 574-322-7XXX 7000–7999Assigned METROPCS, INC. 5562 ELKHART IN
2011-02-22 574-389-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2011-02-22 574-540-7XXX 7000–7999Assigned METROPCS, INC. 5562 PLYMOUTH IN
2011-02-22 574-606-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2011-02-04 574-300-0XXX 0000–0999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-4XXX 4000–4999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-02-04 574-300-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2011-01-31 574-376-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 WARSAW IN
2011-01-20 574-367-7XXX 7000–7999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SOUTH BEND IN
2011-01-10 574-349-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GOSHEN IN
2011-01-07 574-349-3XXX 3000–3999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GOSHEN IN
2011-01-07 574-383-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2011-01-07 574-383-7XXX 7000–7999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SOUTH BEND IN
2011-01-06 574-322-8XXX 8000–8999Assigned METROPCS, INC. 5562 ELKHART IN
2011-01-06 574-322-9XXX 9000–9999Assigned METROPCS, INC. 5562 ELKHART IN
2011-01-06 574-767-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 PLYMOUTH IN
2010-12-21 574-400-1XXX 1000–1999Assigned MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F SOUTH BEND IN
2010-11-30 574-300-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2010-11-23 574-208-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2010-11-23 574-208-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2010-11-23 574-208-8XXX 8000–8999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2010-11-22 574-601-0XXX 0000–0999Assigned METROPCS, INC. 5562 LOGANSPORT IN
2010-11-08 574-635-0XXX 0000–0999Assigned MCC TELEPHONY OF THE MID-WEST, LLC - IN 874F CULVER IN

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.