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| npa-nxx | State | Company | OCN | Rate Center | CLLI | Assign Date | Misc |
| 217-272 | IL | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (Frontier Communications) | 1183 | SORENTO | SRNTILXCRS0 | 00/00/0000 | Prefix Type: ICO Switch Name: SORENTO Switch Type: Auto/Elec GTD5-EAX Digital Remote LATA: Mattoon IL (976) Tandem: N/A Detailed Switch Info |
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| 217-272-0 | IL | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (Frontier Communications) | 1183 | SORENTO | SRNTILXCRS0 | N/A | Prefix Type: ICO Switch Name: SORENTO Switch Type: Auto/Elec GTD5-EAX Digital Remote LATA: Mattoon IL (976) Tandem: N/A Detailed Switch Info |
| 217-272-1 | IL | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (Frontier Communications) | 1183 | SORENTO | SRNTILXCRS0 | N/A | Prefix Type: ICO Switch Name: SORENTO Switch Type: Auto/Elec GTD5-EAX Digital Remote LATA: Mattoon IL (976) Tandem: N/A Detailed Switch Info |
| 217-272-4 | IL | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (Frontier Communications) | 1183 | SORENTO | SRNTILXCRS0 | N/A | Prefix Type: ICO Switch Name: SORENTO Switch Type: Auto/Elec GTD5-EAX Digital Remote LATA: Mattoon IL (976) Tandem: N/A Detailed Switch Info |
| 217-272-9 | IL | CITIZENS TELECOM CO ILLINOIS-FRONTIER CITIZENS -IL (Frontier Communications) | 1183 | SORENTO | SRNTILXCRS0 | N/A | Prefix Type: ICO Switch Name: SORENTO Switch Type: Auto/Elec GTD5-EAX Digital Remote LATA: Mattoon IL (976) Tandem: N/A Detailed Switch Info |