| Network Allowed Carriers (NAC) Field Descriptions | ||
| Field/Object | Descriptions | Valid Values/Actions |
| CCS Network | Mandatory data that identifies a Common Channel Signaling (CCS) Network known to the TFNRegistry™ as specified in the CCS Network Information (NET) page. | 2-alphabetic characters |
| Carriers allowed to be used for this CCS Network | Identifies the Carrier Identification Codes (CICs) that are supported by the retrieved CCS Network. | 4-characters |