The Federal Communications Commission (FCC) has granted a total of 50 licenses and call signs in the category of Restricted Operator license in Portland, Maine. Select a call sign from the table below to view its details such as the date of authorization, expiration date, service description, and so forth.
| Call Sign | License Holder Name | Date of Authorization |
|---|---|---|
| RR00003731 | COLBERT, MICHAEL B | 2001-12-12 |
| RR00005101 | Frueh, Benjamin T | 2002-03-23 |
| RR00011273 | KOVIT, LEONARD | 2003-03-18 |
| RR00011395 | DeLorenzo, Michael A | 2003-03-25 |
| RR00013893 | Sprague, Jr. Mr., Phineas | 2003-09-03 |
| RR00015912 | O'Connell, William M | 2004-01-06 |
| RR00017378 | Blankenship, Michael S | 2004-03-03 |
| RR00025437 | Calli, Charles M | 2005-01-26 |
| RR00030618 | Searcy, Kelley-Jean | 2005-08-06 |
| RR00031071 | Kilmurray, Michael L | 2005-08-25 |
| RR00040784 | Smith, Michael D | 2006-09-27 |
| RR00042126 | von Stade Jr., Philip R | 2006-11-04 |
| RR00060149 | Callahan, Jeffrey M | 2008-06-27 |
| RR00061976 | Wnek, Andrew P | 2008-10-01 |
| RR00063898 | Nicholas, Ronald L | 2009-02-03 |
| RR00066436 | Thing, Robert S | 2009-07-17 |
| RR00069497 | LaCasse, Melissa A | 2010-02-09 |
| RR00069498 | LaCasse, Christopher J | 2010-02-09 |
| RR00073656 | Reilley, Timothy E | 2010-09-18 |
| RR00082695 | Foss, Leo L | 2011-10-29 |
| RR00088925 | Staub, Jacob P | 2012-08-28 |
| RR00090165 | Burchesky, Kyle R | 2012-11-03 |
| RR00095225 | davis, nathaniel p | 2013-06-11 |
| RR00100127 | Pulling, Thomas | 2014-01-30 |
| RR00101129 | LaCasse, David R | 2014-03-11 |
| RR00103733 | Mahaney, Kevin P | 2014-06-12 |
| RR00108451 | Bauer, Gavin E | 2014-12-25 |
| RR00108589 | Drouin, Christopher a | 2015-01-06 |
| RR00111957 | Thompson, Andrew D | 2015-05-13 |
| RR00112813 | amidon, robert s | 2015-06-17 |
| RR00122827 | Aams, Jacob A | 2016-07-01 |
| RR00125662 | McKenna, Scott F | 1998-11-05 |
| RR00128693 | hassan, Ibrahim i | 2017-02-02 |
| RR00131618 | Gavin 807, MF Chip | 2017-05-04 |
| RR00133553 | Trickey, Joshua R | 2017-07-07 |
| RR00143201 | Damon, Alexander P | 2018-05-02 |
| RR00147101 | Rosenblatt MD, Jeffrey A | 2018-08-21 |
| RR00157849 | Walker III, John D | 2019-06-22 |
| RR00158924 | Owens III, Thomas G | 2019-07-24 |
| RR00174359 | Davis, Bruce S | 2021-04-16 |
| RR00174421 | Jones, Benjamin I | 2021-04-17 |
| RR00175850 | Rindlaub, Curtis C | 2021-05-25 |
| RR00177832 | Harris, Jakob L | 2021-07-20 |
| RR00177835 | Radtke, Jonathan L | 2021-07-20 |
| RR00195453 | Erbe, Elizabeth S | 2022-08-31 |
| RR00197647 | Richardson, Eric L | 2022-10-14 |
| RR00198034 | Marou 045, Tijani G | 2022-10-21 |
| RR00205459 | Chieh, Agustin | 2023-03-23 |
| RR00205514 | Quinn, Meghan C | 2023-03-24 |
| RR00207361 | Alves, Anthony | 2023-05-03 |
