Airbus A319 captain reported descending too early and being advised by ATC of flight below the MSA.

Attributes
ACN	1534020
Time
Date	201803
Local Time Of Day	1801-2400
Place
Locale Reference	OKC.Airport
State Reference	OK
Environment
Light	Night
Aircraft 1
Make Model Name	A319
Operating Under FAR Part	Part 121
Flight Phase	Initial Approach
Route In Use	Visual Approach
Flight Plan	IFR
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Multiengine Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument
Events
Anomaly	Deviation - Altitude Overshoot Deviation - Procedural Published Material / Policy Inflight Event / Encounter CFTT / CFIT

Narrative:

I was the captain and pilot monitoring. Arriving okc from northeast. First officer and I verified airport/runway in sight. Cleared for visual approach runway 17L. Proceeded direct hangs which has a crossing altitude of 3;000 feet. Started gradual descent. Had antenna farm in sight. At approximately 3;300 feet MSL ATC advised MSA for area is 3;800 feet MSL. First officer stopped descent and initiated climb. Antennas are 2;749 feet. Once clear of towers; completed a stabilized approach and landing.I suggest that a note be placed in the company pages in flight deck pro noting the presence of this antenna farm.

Original NASA ASRS Text

Title: Airbus A319 Captain reported descending too early and being advised by ATC of flight below the MSA.

Narrative: I was the Captain and pilot monitoring. Arriving OKC from northeast. First Officer and I verified airport/runway in sight. Cleared for visual approach Runway 17L. Proceeded direct HANGS which has a crossing altitude of 3;000 feet. Started gradual descent. Had antenna farm in sight. At approximately 3;300 feet MSL ATC advised MSA for area is 3;800 feet MSL. First Officer stopped descent and initiated climb. Antennas are 2;749 feet. Once clear of towers; completed a stabilized approach and landing.I suggest that a note be placed in the company pages in Flight Deck Pro noting the presence of this antenna farm.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.