List of Vertical Service Codes
The following are the VSCs generally used in the North American Numbering Plan. Not all of these services are available in all areas, and some are only available to landline or cellular telephones. Some require additional services be purchased from the telephone company to use them.
Local Area Signalling Services (LASS) and Custom Calling Feature Control Codes:
| Service | Tone | Pulse/rotary | Notes |
|---|---|---|---|
| Cancel forwarding | *30 | n/a | |
| Automatic Forwarding | *31 | n/a | |
| Notify | *32 | n/a | |
| Intercom Ring 1 (short short) | *51 | 1151 | |
| Intercom Ring 2 (short short long) | *52 | 1152 | |
| Intercom Ring 3 (short long short) | *53 | 1153 | |
| Extension Hold | *54 | 1154 | |
| Customer Originated Trace | *57 | 1157 | |
| Selective Call Rejection (or Call Screen) | *61 | 1160 | |
| Selective Distinct Alert | *61 | 1161 | |
| Selective Call Acceptance | *62 | 1162 | |
| Selective Call Forwarding | *63 | 1163 | |
| ICLID Activation | *65 | 1165 | |
| Busy Number Redial | *66 | 1166 | |
| Number Display Blocking (per call) | *67 | 1167 | |
| Computer Access Restriction | *68 | 1168 | |
| Call Return (incoming) | *69 | 1169 | |
| Call Waiting disable | *70 | 1170 | |
| No Answer Call Transfer | *71 | 1171 | |
| Usage Sensitive 3 way call | *71 | 1171 | |
| Call Forwarding: start | *72 | 1172 | |
| Call Forwarding: cancel | *73 | 1173 | |
| Speed Calling (8 numbers) | *74 | 1174 | |
| Speed Calling (30 numbers) | *75 | 1175 | |
| Anonymous Call Rejection | *77 | 1177 | |
| Call Screen Disable | *80 | 1180 | (or Call Screen) |
| Selective Distinct Disable | *81 | 1181 | |
| Number Display Unblocking (per call) | *82 | 1182 | |
| Select. Forwarding Disable | *83 | 1183 | |
| Caller ID Disable | *85 | 1185 | |
| Busy Number Redial Cancel | *86 | 1186 | |
| Anonymous Call Rejection Disable | *87 | 1187 | |
| Call Return Cancel | *89 | 1189 | |
| Voice-mail | *98 | 1198 |
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