This morning in DCA, on ground frequency:

"Washington Ground, Alaska Maintenance"

Ground replied "Alaska Maintenance, go ahead"

No reply.

"Washington Ground, Alaska Maintenance"

"Go ahead"

No reply

"Washington Ground, Alaska Maintenance"

"Yes, go ahead"

No reply

"Washington Ground, Alaska Maintenance"

This happened, no joke, about 10 to 12 times. Ground guy almost went ballistic. Fun times early in the AM