Based on the Coast Guard Historian’s timeline, https://www.history.uscg.mil/research/chronology/
With inspiration from Mike Kelso
June 10
Side view of the Old Harbor Life Saving Station at Cape Cod National Seashore’s Race Point Beach
1872 Congress ordered that Life-Saving stations were to be erected “under supervision of two captains of the revenue service.” An Act of Congress authorized government life-saving stations on Cape Cod and Block Island.
New Shoreham Life Saving Station, formerly located on Block Island, now at Mystic Seaport
1922 Congress readjusted pay and allowances of Coast Guard commissioned and enlisted personnel on basis of equality with other services. Until this time a Coast Guard captain was equivalent to a Navy lieutenant commander.
Command, Control, Communications, Computers, Cyber, and Intelligence Service Center (C5ISC)
2020 The Command, Control, Communications, Computers, and Information Technology Service Center (C4ITSC) was disestablished and the Command, Control, Communications, Computers, Cyber, and Intelligence Service Center (C5ISC) was established at a commissioning ceremony held on 10 June 2020 on grounds of the Coast Guard property in Alexandria, VA, formerly known as USCG Washington Radio Station (NMH) and later TISCOM. The facility was formerly renamed COGARD C5ISC Alexandria VA.
Chuck Hill's CG Blog 
Hopefully now that conservatives are in charge the services will STOP RENAMING EVERYTHING on a regular basis incurring huge cost in the transformation. Renaming things should NOT be a plus, and certainly NOT advance your career.
When the name changed happened it was the first Trump administration.
The difference was the addition of cyber and intelligence.
OK . . . pull up the stats . . . how many [consequential] name changes happened during Trump 45, and how many happened during Biden 46? Afraid of the number are we?
I thought this was an apolitical forum. Hopefully, we can get back to that.
C5ISC is now on the chopping block as a name and as a command.
The CG is following the Navy’s path and going to PEO’s (Program Executive Office‘s). This will all be under the new Deputy COMDT for Systems (DCS). I believe DCS is migrating from DCMS??
Under Force Design 2028, C5ISC will be disestablished and split up into (you guessed it) at least three different PEO’s (w/an O-6 in charge of each PEO).
Some possible scenarios are: PEO C4I, PEO-Software, PEO-OT (Operational Technology).
There are major changes coming to the CG, again!!
There should be a wiki page just dedicated to the CG and it’s various names / command structures over the past 40 years.
Areas and MLC’s
Groups & Sectors
SUPCEN’s
ISC’s
ESU’s/ESD’s