Specify your combat level (only below your current level)

[chuckv3]

This could be done so you can go back and do out-leveled contacts, or if you wish to do some level-specific content NOT available in Flashbacks (like bank protection missions)

[Rudra]

23 minutes ago, chuckv3 said:

(like bank protection missions)

Talk to Agent Hassell in Steel Canyon. He is an unlockable contact. The requirements are be at least level 10 and have the Villain Disruptor badge.

 

Zone	Steel Canyon
Coordinates	(-2495.0, -83.9, -1355.0)[Copy]
Level Range	10-50

[Doc_Scorpion]

Ouroboros already exists.

And honestly, it's easier (at least for me) to use the XP lock and complete all the contacts at a given level and then move on.  (That way I don't have to worry about diminished enhancement effectiveness, etc...)