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
2013-07-03 574-401-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2013-06-13 574-992-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J LOGANSPORT IN
2013-06-10 574-318-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2013-06-10 574-318-6XXX 6000–6999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2013-06-05 574-334-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SOUTH BEND IN
2013-05-23 574-334-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SOUTH BEND IN
2013-05-16 574-675-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F OSCEOLA IN
2013-05-03 574-327-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J ELKHART IN
2013-04-29 574-327-9XXX 9000–9999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2013-04-25 574-575-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2013-04-18 574-914-6XXX 6000–6999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 PLYMOUTH IN
2013-03-20 574-566-7XXX 7000–7999Assigned ONVOY, LLC - IN 097D CLAYPOOL IN
2013-03-13 574-807-6XXX 6000–6999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 SOUTH BEND IN
2013-03-08 574-312-3XXX 3000–3999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 GOSHEN IN
2013-03-05 574-350-3XXX 3000–3999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 ELKHART IN
2013-03-04 574-914-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 PLYMOUTH IN
2013-02-07 574-334-5XXX 5000–5999Assigned PAETEC ITEL, LLC 829J SOUTH BEND IN
2013-02-01 574-948-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH IN
2013-01-31 574-549-5XXX 5000–5999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 WARSAW IN
2012-12-19 574-350-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 ELKHART IN
2012-11-30 574-635-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F CULVER IN
2012-11-15 574-318-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-11-15 574-318-2XXX 2000–2999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 SOUTH BEND IN
2012-11-15 574-326-2XXX 2000–2999Assigned METROPCS, INC. 5562 ELKHART IN
2012-11-14 574-334-4XXX 4000–4999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 SOUTH BEND IN
2012-11-12 574-401-1XXX 1000–1999Assigned NUSO, LLC 551G SOUTH BEND IN
2012-10-08 574-334-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SOUTH BEND IN
2012-10-08 574-341-1XXX 1000–1999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 PLYMOUTH IN
2012-10-08 574-635-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 CULVER IN
2012-10-03 574-318-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-09-28 574-651-8XXX 8000–8999Assigned COMCAST IP PHONE, LLC 318J OSCEOLA IN
2012-09-21 574-213-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-09-21 574-213-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-09-21 574-440-8XXX 8000–8999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-09-13 574-213-5XXX 5000–5999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-09-13 574-213-6XXX 6000–6999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-09-13 574-213-7XXX 7000–7999Assigned ONVOY, LLC - IN 097D SOUTH BEND IN
2012-08-29 574-213-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 SOUTH BEND IN
2012-08-21 574-253-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - IN 6725 LEESBURG IN
2012-08-15 574-797-3XXX 3000–3999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 NEWCARLISL IN
2012-07-13 574-213-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-07-13 574-213-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F SOUTH BEND IN
2012-07-09 574-540-8XXX 8000–8999Assigned METROPCS, INC. 5562 PLYMOUTH IN
2012-05-31 574-376-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 WARSAW IN
2012-05-31 574-808-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J MONTICELLO IN
2012-05-24 574-747-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - IN 7314 ELKHART IN
2012-05-16 574-808-2XXX 2000–2999Assigned LEVEL 3 COMMUNICATIONS, LLC - IN 4803 MONTICELLO IN
2012-04-16 574-747-8XXX 8000–8999Assigned MCIMETRO ACCESS TRANSMISSION SERVICES LLC - IN 7440 ELKHART IN
2012-04-11 574-341-0XXX 0000–0999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PLYMOUTH IN
2012-03-30 574-303-1XXX 1000–1999Assigned BANDWIDTH.COM CLEC, LLC - IN 105F 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.