NumberResearch Membership · Data 09/20/2026

Recent thousands-block assignments

2 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 616
NEW CINGULAR WIRELESS PCS, LLC - IL 1
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 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
2016-09-20 616-888-4XXX 4000–4999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2016-09-20 616-888-5XXX 5000–5999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2016-09-16 616-377-5XXX 5000–5999Assigned COMCAST IP PHONE, LLC 318J HOLLAND MI
2016-09-14 616-215-2XXX 2000–2999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRANDHAVEN MI
2016-09-14 616-649-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-09-14 616-747-1XXX 1000–1999Assigned NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ROCKFORD MI
2016-08-26 616-236-7XXX 7000–7999Assigned CLEAR RATE COMMUNICATIONS, LLC 046L GREENVILLE MI
2016-08-22 616-213-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 CEDAR SPG MI
2016-08-16 616-649-5XXX 5000–5999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2016-08-16 616-649-7XXX 7000–7999Assigned OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2016-08-11 616-888-2XXX 2000–2999Assigned COMCAST IP PHONE, LLC 318J GRAND RPDS MI
2016-08-10 616-649-4XXX 4000–4999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRAND RPDS MI
2016-08-05 616-215-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRANDHAVEN MI
2016-08-03 616-239-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ZEELAND MI
2016-08-03 616-649-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GRAND RPDS MI
2016-07-26 616-217-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E BYRON CTR MI
2016-07-26 616-239-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ZEELAND MI
2016-07-26 616-383-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E SPARTA MI
2016-07-26 616-552-9XXX 9000–9999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E GRAND RPDS MI
2016-07-26 616-727-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ADA MI
2016-07-26 616-841-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E IONIA MI
2016-07-25 616-213-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E CEDAR SPG MI
2016-07-25 616-236-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E GREENVILLE MI
2016-07-25 616-512-3XXX 3000–3999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E DUTTON MI
2016-07-20 616-747-0XXX 0000–0999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E ROCKFORD MI
2016-07-15 616-930-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-07-15 616-930-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-07-05 616-625-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C CONKLIN MI
2016-06-27 616-441-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C LAKEODESSA MI
2016-06-27 616-737-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C SARANAC MI
2016-06-23 616-229-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HUDSONVL MI
2016-06-22 616-201-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E GRANDHAVEN MI
2016-06-22 616-377-4XXX 4000–4999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E HOLLAND MI
2016-06-22 616-649-2XXX 2000–2999Assigned BANDWIDTH.COM CLEC, LLC - MI 991E GRAND RPDS MI
2016-06-13 616-201-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRANDHAVEN MI
2016-06-13 616-930-0XXX 0000–0999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-05-25 616-377-3XXX 3000–3999Assigned METROPCS, INC. 5562 HOLLAND MI
2016-05-13 616-201-9XXX 9000–9999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRANDHAVEN MI
2016-05-13 616-591-4XXX 4000–4999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-05-13 616-591-7XXX 7000–7999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-05-09 616-649-0XXX 0000–0999Assigned AT&T ENTERPRISES, LLC 516C GRAND RPDS MI
2016-05-06 616-591-6XXX 6000–6999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-05-05 616-512-4XXX 4000–4999Assigned COMCAST IP PHONE, LLC 318J DUTTON MI
2016-05-04 616-649-9XXX 9000–9999Assigned TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRAND RPDS MI
2016-04-29 616-591-5XXX 5000–5999Assigned LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GRAND RPDS MI
2016-04-22 616-591-9XXX 9000–9999Assigned 123.NET, LLC 2550 GRAND RPDS MI
2016-04-21 616-591-8XXX 8000–8999Assigned CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2016-03-31 616-591-3XXX 3000–3999Assigned COMCAST IP PHONE, LLC 318J GRAND RPDS MI
2016-03-29 616-591-0XXX 0000–0999Assigned ONVOY, LLCV - MI 543C GRAND RPDS MI
2016-03-29 616-591-1XXX 1000–1999Assigned ONVOY, LLCV - MI 543C GRAND RPDS 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.