DBA: Comporium, Inc. Carrier Type: Incumbent LEC Holding Company: Address 1: PO Box 470 Address 2: City: Rock Hill State: SC Zip Code: 29731 Filer ID: 803649 Customer Inquiries Telephone Number: (803) 326-6450 Share this:TwitterFacebookPrintEmailLinkedInRedditTumblrPinterestPocketTelegramWhatsAppSkypeLike this:Like Loading...