AT&T Internet and phone service were disrupted in the area at about 12 p.m. Friday.
Users around the country reported disruptions in service but there was a concentration in the Nashville area and Middle Tennessee.
A handful of local police departments reported the outage was disrupting 911 access, including some non-emergency lines, in their jurisdictions.
“Service for some customers in Nashville and the surrounding areas may be affected by damage to our facilities from the explosion this morning. We are in contact with law enforcement and working as quickly and safely as possible to restore service,” said Jim Greer, an AT&T representative.
Nashville authorities said investigators think the explosion was an “intentional act” and sparked by a vehicle blast.
Police came across a suspicious RV parked outside a nearby AT&T building near Second Avenue and Commerce Street before 6 a.m., when initially responding to calls of shots fired in the area, said Metro police spokesperson Don Aaron.
There were no immediate evidence of any shooting but officers alerted the department’s bomb squad, which was en route when a “significant explosion” happened about 30 minutes later, Aaron said.