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
2021-01-19 616-321 0–9 XXXall 10 · 3 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
2020-09-30 616-317 0–9 XXXall 10 · 4 holders which blocks → HD CARRIER LLC 321J GRAND RPDS MI
2020-08-31 616-327 0–9 XXXall 10 · 4 holders which blocks → NUSO, LLC 478J GRAND RPDS MI
2020-08-20 616-766 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H BELDING MI
2020-06-25 616-276 0XXX2XXX3XXX4XXX6XXX7XXX8XXX · 4 holders which blocks → CSC WIRELESS, LLC 425J ALTO MI
2020-06-24 616-612 0–9 XXXall 10 · 3 holders which blocks → ONVOY, LLCV - MI 543C GRANDHAVEN MI
2020-06-12 616-310 0XXX1XXX2XXX3XXX4XXX5XXX6XXX8XXX9XXX · 3 holders which blocks → MCIMETRO ACCESS TRANSMISSION SERVICES LLC - MI 7157 COOPERSVL MI
2020-02-19 616-400 0–9 XXXall 10 · 7 holders which blocks → FRACTEL, LLC 965H SARANAC MI
2019-12-09 616-271 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CALEDONIA MI
2019-09-23 616-500 0–9 XXXall 10 · 5 holders which blocks → ONVOY SPECTRUM, LLC 624H GRAND RPDS MI
2019-09-16 616-306 0–9 XXXall 10 · 4 holders which blocks → EXIANT COMMUNICATIONS LLC 114J GRAND RPDS MI
2019-08-19 616-352 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRAND RPDS MI
2019-06-17 616-330 0–9 XXXall 10 · 3 holders which blocks → VOIP INNOVATIONS, LLC 597F GRAND RPDS MI
2019-05-13 616-300 0–9 XXXall 10 · 4 holders which blocks → FRACTEL, LLC 965H HUDSONVL MI
2019-04-22 616-286 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 GRAND RPDS MI
2019-03-28 616-382 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRAND RPDS MI
2019-03-01 616-273 0XXX1XXX2XXX4XXX5XXX7XXX9XXX · 3 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G MARNE MI
2019-02-28 616-385 0XXX1XXX3XXX8XXX9XXX · 5 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G KENT CITY MI
2019-02-26 616-900 0–9 XXXall 10 · 6 holders which blocks → TERRA NOVA TELECOM INC. 145J GRAND RPDS MI
2019-01-24 616-800 0XXX4XXX6XXX7XXX8XXX9XXX · 5 holders which blocks → FRACTEL, LLC 965H JAMESTOWN MI
2019-01-24 616-816 0–9 XXXall 10 · 5 holders which blocks → FRACTEL, LLC 965H GRAND RPDS MI
2018-10-04 616-287 0–9 XXXall 10 · 2 holders which blocks → TELNET WORLDWIDE, INC. 817J GRAND RPDS MI
2018-09-21 616-483 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - MI 991E DUTTON MI
2018-09-13 616-410 0–9 XXXall 10 · 6 holders which blocks → PAETEC ITEL, LLC 829J GRAND RPDS MI
2018-09-13 616-535 0–9 XXXall 10 · 4 holders which blocks → METROPCS, INC. 5562 SPARTA MI
2018-08-22 616-585 0XXX1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C CEDAR SPG MI
2018-07-13 616-256 0–9 XXXall 10 · 6 holders which blocks → TELNET WORLDWIDE, INC. 817J GRAND RPDS MI
2018-06-29 616-210 0–9 XXXall 10 · 6 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 ZEELAND MI
2018-06-20 616-655 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2018-04-12 616-416 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MI 6003 HOLLAND MI
2018-02-22 616-428 0–9 XXXwhole prefix which blocks → CENTURYLINK COMMUNICATIONS, LLC 508J GRAND RPDS MI
2017-10-04 616-600 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C GRAND RPDS MI
2017-06-27 616-729 0–9 XXXall 10 · 3 holders which blocks → VONAGE AMERICA LLC 197D GRAND RPDS MI
2017-04-28 616-279 0–9 XXXall 10 · 4 holders which blocks → COMCAST IP PHONE, LLC 318J GRAND RPDS MI
2017-04-13 616-274 0–9 XXXall 10 · 5 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 ADA MI
2016-11-22 616-251 0–9 XXXall 10 · 5 holders which blocks → OMNIPOINT COMMUNICATIONS MIDWEST OPERATIONS, LLC 2964 HOLLAND MI
2016-11-21 616-268 0–9 XXXall 10 · 4 holders which blocks → PEERLESS NETWORK OF MICHIGAN, LLC - MI 933G GRANDHAVEN MI
2016-10-12 616-265 0–9 XXXall 10 · 5 holders which blocks → TELNET WORLDWIDE, INC. 817J GRAND RPDS MI
2016-09-23 616-278 0–9 XXXall 10 · 7 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 GRAND RPDS MI
2016-09-19 616-489 0–9 XXXall 10 · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 IONIA MI
2016-06-30 616-625 0XXX1XXX2XXX4XXX5XXX6XXX7XXX8XXX9XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C CONKLIN MI
2016-03-04 616-737 0–9 XXXall 10 · 2 holders which blocks → ONVOY, LLCV - MI 543C SARANAC MI
2016-03-03 616-580 0XXX1XXX2XXX4XXX5XXX6XXX8XXX · 3 holders which blocks → ONVOY, LLCV - MI 543C DORR MI
2016-03-03 616-779 0XXX1XXX5XXX6XXX7XXX8XXX9XXX · 4 holders which blocks → ONVOY, LLCV - MI 543C GRATTAN MI
2016-03-02 616-207 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C LOWELL MI
2016-02-29 616-747 0XXX1XXX3XXX4XXX5XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → ONVOY, LLCV - MI 543C ROCKFORD MI
2016-02-24 616-201 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C GRANDHAVEN MI
2016-02-12 616-591 0–9 XXXall 10 · 5 holders which blocks → COMCAST IP PHONE, LLC 318J GRAND RPDS MI
2016-02-12 616-727 0–9 XXXall 10 · 4 holders which blocks → ONVOY, LLCV - MI 543C ADA MI
2016-02-05 616-649 0–9 XXXall 10 · 7 holders which blocks → TELEPORT COMMUNICATIONS AMERICA, LLC - MI 770E 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.