How should I identify these assignments to the RIPE NCC in the RIPE Database?

By placing a remarks attribute in the inetnum object with a value of INFRA-AW. It is important that a seprate remarks attribute is used for this line. No comments should be placed before or after INFRA-AW in this attribute. It is possible to have other remarks attributes, though. Here's an example:

         inetnum: 192.168.3.128 - 192.168.3.255
netname: SOMECOMPANY-MAIL-SERVERS
descr: Inbound and Outbound SMTP mail clusters
and POP3 and IMAP front ends
country: EU
admin-c: HOHO-RIPE
tech-c: HOHO-RIPE
status: ASSIGNED PA
remarks: INFRA-AW
remarks: You can notify the MailTeam of
problems 24/7 by paging them at...