Invalid Contact References
Nic handles of person or role objects should consist of letters, numbers and '-'. References to person/role objects not complying this convention should not exist, since it probably points to an invalid person/role object. The most typical examples are references by phone, name, or e-mail address instead of a nic handle.
In the following example, John Smith is an invalid contact.
inetnum: 10.10.10.0 - 10.10.10.255
descr: NONIC ISP
admin-c: John Smith
status: ASSIGNED PA
remarks: Internet Service Provider
changed: foo _at_ bar _dot_ com 19960704