Maryland FIRST 700mhz TRS

[ThePhotoGuy]

I have 1213xxx as USMS.

Based on your RID identification than 8430, 8431, 8432, 8433 are likely USMS. All Fully Encrypted.

 

[1977addis]

These are the 12645xx RIDs on MD FiRST TG 8436 and various TGs on the USCP VHF TRS lately:

1264501
1264502
1264504
1264506
1264509
1264510
1264511
1264516
1264517
1264522
1264523
1264540
1264542
1264548
1264551
1264554

I'm very curious, have you confirmed 12645xx is HHS? I'm familiar with their TacMed units, they've been assisting USCP and others during the various NSSEs lately. I assume that's who the HHS units would be?

The FiRST usage was during the Jimmy Carter arrival/procession to the Capitol on Tues. HHS TacMeds were part of the procession etc. But, I'm not really sure why they'd have a TG on the FiRST system? The procession was in MD for a bit (started at JB Andrews). I just assumed they used the channel of whatever agency they are assisting?

We hear Amtrak PD with RIDs 1248000-1248005 on the DC 7/800 MHz system.

I previously recorded 1235236 and 1235253 on MWAA PD channels, but I was never able to confirm who the user was. I had initially thought it might be USSS ("Flagship" dispatch console 1234948 appears to monitor MPD's SD4-SEC constantly). But, in hindsight, the presence of 1235xxx RIDs on several transportation-related TGs might suggest another agency. Maybe TSA VIPR?

Those fall under the WMATA range

 

[Hbright]

Those fall under the WMATA range

Which fall under the WMATA range? WMATA is 1120000 to 114xxxx.

 

[maus92]

These are the 12645xx RIDs on MD FiRST TG 8436 and various TGs on the USCP VHF TRS lately:

1264501
1264502
1264504
1264506
1264509
1264510
1264511
1264516
1264517
1264522
1264523
1264540
1264542
1264548
1264551
1264554

I'm very curious, have you confirmed 12645xx is HHS? I'm familiar with their TacMed units, they've been assisting USCP and others during the various NSSEs lately. I assume that's who the HHS units would be?

The FiRST usage was during the Jimmy Carter arrival/procession to the Capitol on Tues. HHS TacMeds were part of the procession etc. But, I'm not really sure why they'd have a TG on the FiRST system? The procession was in MD for a bit (started at JB Andrews). I just assumed they used the channel of whatever agency they are assisting?

We hear Amtrak PD with RIDs 1248000-1248005 on the DC 7/800 MHz system.

I previously recorded 1235236 and 1235253 on MWAA PD channels, but I was never able to confirm who the user was. I had initially thought it might be USSS ("Flagship" dispatch console 1234948 appears to monitor MPD's SD4-SEC constantly). But, in hindsight, the presence of 1235xxx RIDs on several transportation-related TGs might suggest another agency. Maybe TSA VIPR?

HHS is a limited primary user on FIRST, and they have several tgs for occasional use / use in emergencies.

 

[ThePhotoGuy]

Fiscal Year 2026 Capital Budget Info Related to FiRST:

https://mgaleg.maryland.gov/pubs/budgetfiscal/2026fy-budget-docs-capital-FB04-Department-of-Information-Technology.pdf

 

[maus92]

I see the FS30 site in Montgomery County has been reprogrammed to FY25 - probably due to Trump's golf course along the Potomac River - to enhance coverage for DNR's boats and other security measures.

 

[brian86]

Does anyone know the locations of the Charles County Simulcast Towers? Is there one close to the RT301 / Leonardtown Road Intersection? I have tried to find the info via FCC ULS but because they are using the state license it is more difficult then I thought it would be to locate.

 

[maus92]

They have a site colocated on Charles County owned infrastructure in Waldorf.

 

[Hbright]

These are the 12645xx RIDs on MD FiRST TG 8436 and various TGs on the USCP VHF TRS lately:

1264501
1264502
1264504
1264506
1264509
1264510
1264511
1264516
1264517
1264522
1264523
1264540
1264542
1264548
1264551
1264554

I'm very curious, have you confirmed 12645xx is HHS? I'm familiar with their TacMed units, they've been assisting USCP and others during the various NSSEs lately. I assume that's who the HHS units would be?

The FiRST usage was during the Jimmy Carter arrival/procession to the Capitol on Tues. HHS TacMeds were part of the procession etc. But, I'm not really sure why they'd have a TG on the FiRST system? The procession was in MD for a bit (started at JB Andrews). I just assumed they used the channel of whatever agency they are assisting?

We hear Amtrak PD with RIDs 1248000-1248005 on the DC 7/800 MHz system.

I previously recorded 1235236 and 1235253 on MWAA PD channels, but I was never able to confirm who the user was. I had initially thought it might be USSS ("Flagship" dispatch console 1234948 appears to monitor MPD's SD4-SEC constantly). But, in hindsight, the presence of 1235xxx RIDs on several transportation-related TGs might suggest another agency. Maybe TSA VIPR?

RIDs 1264504, 1264510, and 1264514 were affiliated with the USCP TRS during the Joint Session on Tuesday.

 

[ThePhotoGuy]

RIDs 1264504, 1264510, and 1264514 were affiliated with the USCP TRS during the Joint Session on Tuesday.

Sort of off topic but...

What is the RID range for US Capitol Police on their system? I once logged 12251xx on FiRST and thought by their call sign it might have been Capitol Police.

 

[BM82557]

Sort of off topic but...

What is the RID range for US Capitol Police on their system? I once logged 12251xx on FiRST and thought by their call sign it might have been Capitol Police.

Ranges I've noted ==

10006 - 12574
20001 - 21268
30003 - 33572
35002 - 35129
40106 - 40284
70003 - 70017

 

[Hbright]

1290xxx is USCP on 7/800 MHz systems. Hear/see them pretty often on the DC TRS.

Not sure who 12251xx is.