NumberResearch Membership · Data 09/19/2026

Recent prefix assignments

0 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/19/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, all time — NPA 616
MICHIGAN BELL TEL CO 143
CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 61
OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 52
ONVOY, LLCV - MI 41
NEW CINGULAR WIRELESS PCS, LLC - IL 37
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 NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2015-12-04 616-266 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G TRUFANT MI
2015-11-23 616-369 0–9 XXXwhole prefix which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2015-09-28 616-236 0–9 XXXall 10 · 6 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G GREENVILLE MI
2015-09-28 616-377 0–9 XXXall 10 · 7 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G HOLLAND MI
2015-08-18 616-441 0XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C LAKEODESSA MI
2015-08-17 616-333 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2015-06-16 616-888 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2014-10-06 616-404 0XXX1XXX2XXX3XXX4XXX5XXX6XXX7XXX8XXX · 2 holders which blocks → ONVOY, LLCV - MI 543C CASNOVIA MI
2014-10-01 616-239 0–9 XXXall 10 · 7 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ZEELAND MI
2014-09-01 616-213 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX9XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CEDAR SPG MI
2014-07-25 616-215 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRANDHAVEN MI
2014-07-25 616-930 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2014-05-12 616-229 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E HUDSONVL MI
2014-03-31 616-228 0–9 XXXall 10 · 5 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G GRAND RPDS MI
2014-02-12 616-227 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ADA MI
2013-09-16 616-219 0–9 XXXall 10 · 6 holders which blocks → MICHIGAN BELL TEL CO 9323 DUTTON MI
2013-07-30 616-202 0–9 XXXall 10 · 6 holders which blocks → XO COMMUNICATIONS SERVICES, INC. - MI 4125 GRAND RPDS MI
2013-07-30 616-552 0–9 XXXall 10 · 6 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 GRAND RPDS MI
2013-06-21 616-368 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HOLLAND MI
2013-03-16 616-253 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C MOLINE MI
2013-03-08 616-303 0–9 XXXall 10 · 4 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E GREENVILLE MI
2012-12-20 616-216 0–9 XXXall 10 · 3 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ADA MI
2012-11-29 616-294 0–9 XXXall 10 · 8 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K HOLLAND MI
2012-11-12 616-383 0–9 XXXall 10 · 6 holders which blocks → AT&T ENTERPRISES, LLC 516C SPARTA MI
2012-10-22 616-323 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2012-07-18 616-288 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2012-05-17 616-275 0–9 XXXall 10 · 6 holders which blocks → CHARTER IP ENABLED SERVICES, LLC 792K CALEDONIA MI
2012-05-08 616-449 0–9 XXXall 10 · 5 holders which blocks → WOW! INTERNET, CABLE AND PHONE 961J FREEPORT MI
2012-02-15 616-259 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 GRAND RPDS MI
2012-02-08 616-426 0–9 XXXall 10 · 3 holders which blocks → LEVEL 3 COMMUNICATIONS, LLC - MI 6120 GRAND RPDS MI
2011-08-11 616-326 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 5 holders which blocks → ONVOY, LLCV - MI 543C ROCKFORD MI
2011-08-05 616-419 0–9 XXXall 10 · 6 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2011-06-27 616-329 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2011-04-27 616-312 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
2011-04-06 616-512 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J DUTTON MI
2011-03-10 616-432 0–9 XXXall 10 · 6 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRAND RPDS MI
2010-12-23 616-319 0–9 XXXall 10 · 6 holders which blocks → ONVOY, LLCV - MI 543C LOWELL MI
2010-11-11 616-375 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2010-08-05 616-427 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2010-07-23 616-466 0–9 XXXall 10 · 4 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2010-07-13 616-337 0–9 XXXwhole prefix which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2010-07-02 616-422 0–9 XXXall 10 · 2 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
2010-06-10 616-325 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2010-04-02 616-965 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2010-03-09 616-920 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E ADA MI
2010-03-05 616-414 0–9 XXXall 10 · 5 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E GRANDHAVEN MI
2010-02-16 616-438 0–9 XXXall 10 · 5 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2010-02-16 616-439 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E CEDAR SPG MI
2009-09-24 616-264 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 GRAND RPDS MI
2009-09-11 616-238 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/19/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.