Boeing RC-135 —

I'd think that is an RC-135

This should be a USAF RC-135V "Rivet Joint" that started life as a RC-135B Stratotanker, USAF s/n 64-14841, msn 18781. Later converted to an RC-135C with a subsequent conversion to present RC-135V.

Based off the old Boeing 707 airframe.

"Based off the old Boeing 707 airframe"...

No, didn't happen that way!
The KC-135 came ahead of the 707.
Boeing's designation for the KC-135 was their Model 717.
The 707 fuselage is wider and longer and structurally different.
Both types trace to Boeing's "Dash 80" design, however.

Thanks guys for the information that was great, So I guess I put in RC-135V. This is what is great about this web site we can all learn more about aircraft. Thanks again.

I put in RC-135 and KC-135 but the system did not accept either?

Stephen, you're welcome and thank you for sharing the photo with us!

Try entering "R135" for aircraft type.

That is showing for other Boeing RC-135 aircraft in FA's system.

Tank you Cliff.

Thanks Cliff is what I meant to spell LOL

Not to worry, I've "tanked" a time or two in my days... :-)

Thanks to you again, Stephen, and you are welcome.