| Time (Eastern US) | Author | Comment (most recent last) | Actions |
| 2014-01-24 00:00:00 | FCC App# 1576966 | License Renewed | Fix Delete Reply to |
| 2014-08-21 06:43:49 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2015-03-14 13:34:47 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2015-03-27 19:07:19 | editor | Station Format updated from #1 Hits to Top 40 | Fix Delete Reply to |
| 2015-03-27 19:07:24 | editor | Changed streaming URL to http://www.iheart.com/live/1961/?autoplay=true&pname=884&campid=play_bar&cid=main.html | Fix Delete Reply to |
| 2015-03-27 19:07:27 | editor | Updated Schedule URL to http://www.z100portland.com/onair/ | Fix Delete Reply to |
| 2015-03-27 19:07:42 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2015-08-21 03:04:40 | charlottenc | Station Web Site Reviewed | Fix Delete Reply to |
| 2015-11-21 16:10:12 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2016-02-21 15:35:45 | editor | Updated Station URL to http://z100portland.iheart.com/main.html | Fix Delete Reply to |
| 2016-02-21 15:35:48 | editor | Changed streaming URL to http://www.iheart.com/live/1961/?autoplay=true&pname=884&campid=play_bar&cid=main.html | Fix Delete Reply to |
| 2016-02-21 15:35:50 | editor | Updated Station URL to http://z100portland.iheart.com/ | Fix Delete Reply to |
| 2016-11-13 22:23:01 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2018-04-11 00:00:00 | FCC App# 1780766 | FCC approved transfer of license from CITICASTERS LICENSES, INC. to CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION | Fix Delete Reply to |
| 2018-04-21 12:39:51 | editor | Automated Update of homepage URL from http://z100portland.iheart.com/ to https://z100portland.iheart.com/ | Fix Delete Reply to |
| 2018-10-10 00:00:00 | FCC App# 1800237 | FCC received request to transfer license from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. | Fix Delete Reply to |
| 2018-10-10 00:00:00 | FCC App# 1795654 | FCC received request to transfer license from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. | Fix Delete Reply to |
| 2018-10-10 00:00:00 | FCC App# 1786949 | FCC received request to transfer license from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. | Fix Delete Reply to |
| 2018-11-08 00:00:00 | FCC App# 1786949 | FCC request to transfer license from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. superceded | Fix Delete Reply to |
| 2018-11-14 00:00:00 | FCC App# 1795654 | FCC request to transfer license from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. superceded | Fix Delete Reply to |
| 2019-02-15 00:00:00 | FCC App# 1796045 | FCC request to transfer license from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. superceded | Fix Delete Reply to |
| 2019-05-03 06:42:19 | | Licensee changed from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. | Fix Delete Reply to |
| 2019-05-03 06:42:19 | | Licensee changed from CITICASTERS LICENSES, INC., AS DEBTOR IN POSSESSION to CITICASTERS LICENSES, INC. | Fix Delete Reply to |
| 2019-05-04 18:40:47 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2020-10-20 23:21:03 | editor | Station Homepage Title changed from Z100 Portland - Portland's #1 Hit Music Station to Z100 Portland - Portland's #1 Hit Music Station | Fix Delete Reply to |
| 2020-10-20 23:23:19 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2020-11-10 00:00:00 | FCC App# 1817013 | FCC approved transfer of license from CITICASTERS LICENSES, INC. to IHM LICENSES, LLC | Fix Delete Reply to |
| 2025-03-20 13:45:48 | editor | Station Web Site Reviewed | Fix Delete Reply to |
| 2025-08-03 03:06:13 | editor | listenURL was Reset | Fix Delete Reply to |
| 2025-08-03 03:08:08 | editor | Updated Schedule URL to https://z100portland.iheart.com/schedule/ | Fix Delete Reply to |
