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| npa-nxx | State | Company | FRN | RMD | OCN | Rate Center | CLLI | Assign Date | Misc |
| 740-347 | OH | OHIO BELL TEL CO (AT&T) | N/A | 9321 | CORNING | CRNGOH34RS1 | 00/00/0000 | Prefix Type: RBOC Switch Name: CORNING Switch Type: N/A LATA: Columbus OH (324) Tandem: CLMBOH115GT 🔧 Explore Switch(CLLI: CRNGOH34RS1)) | |
| 740-347 is split into 1,000-number blocks - detail below | |||||||||
| 740-347-4XXX | OH | OHIO BELL TEL CO (AT&T) | N/A | 9321 | CORNING | CRNGOH34RS1 | N/A | Prefix Type: RBOC Switch Name: CORNING Switch Type: N/A LATA: Columbus OH (324) Tandem: CLMBOH115GT 🔧 Explore Switch(CLLI: CRNGOH34RS1)) | |
| 740-347-9XXX | OH | OHIO BELL TEL CO (AT&T) | N/A | 9321 | CORNING | CRNGOH34RS1 | N/A | Prefix Type: RBOC Switch Name: CORNING Switch Type: N/A LATA: Columbus OH (324) Tandem: CLMBOH115GT 🔧 Explore Switch(CLLI: CRNGOH34RS1)) |