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| npa-nxx | State | Company | FRN | RMD | OCN | Rate Center | CLLI | Assign Date | Misc |
| 443-747 | MD | CORE COMMUNICATIONS, INC.- MD | N/A | 2593 | PT DEPOSIT | BLTMMD91DS1 | 02/22/2002 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMD91DS1)) | |
| 443-747 is split into 1,000-number blocks - detail below | |||||||||
| 443-747-0XXX | MD | CORE COMMUNICATIONS, INC.- MD | N/A | 2593 | PT DEPOSIT | BLTMMD91DS1 | 03/04/2004 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMD91DS1)) | |
| 443-747-3XXX | MD | CORE COMMUNICATIONS, INC.- MD | N/A | 2593 | PT DEPOSIT | BLTMMD91DS1 | N/A | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMD91DS1)) | |
| 443-912 | MD | CORE COMMUNICATIONS, INC.- MD | N/A | 2593 | TOWSON | BLTMMD91DS1 | 07/02/2002 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMD91DS1)) | |
| 443-912 is split into 1,000-number blocks - detail below | |||||||||
| 443-912-1XXX | MD | CORE COMMUNICATIONS, INC.- MD | N/A | 2593 | TOWSON | BLTMMD91DS1 | 07/15/2002 | Prefix Type: CLEC Switch Name: N/A Switch Type: N/A LATA: Baltimore MD (238) Tandem: N/A 🔧 Explore Switch(CLLI: BLTMMD91DS1)) |