Please note that this is a living document, and will be expanded over time. The values present are recommended as a general data set, and ISIPP's IADB does not contain all of the codes below, although all codes used by the IADB comply with the below.

Also note that while the "z" position is generally used to indicate the "how much" of something, where, if it is measurable only as a "yes" or "no", then "0" is used for "no" and "255" is used for "yes". However, the ranges 127.x.128.z through 127.x.255.z are reserved for categories where "z" equal a specific subcategory, rather than a measure of "how much". For example, the 127.2.129.z range is used to indicate "country" with "z" indicating the geographic location.

127.0.0.1; 127.0.0.2: reserved special responses for "presence in list database"

127.0.1.z: statements of known facts related to relationships between list maintainer and listee

127.0.1.z = vouched
127.0.2.z = member
127.0.3.z = bonded
127.0.4.z = contractual pledge

127.1.y.z: statements of known facts related to observed characteristics

127.1.0.z = sender volume, last 24 hours
127.1.1.z = sender volume, last 1 week
127.1.2.z = sender volume, last 1 month
127.1.3.z = sender volume, last 1 year
127.1.8.z = complaint rate, last 24 hours
127.1.9.z = complaint rate, last 1 week
127.1.10.z = complaint rate, last 1 month
127.1.11.z = complaint rate, last 1 year
127.1.16.z = bounce rate, last 24 hours
127.1.17.z = bounce rate, last 1 week
127.1.18.z = bounce rate, last 1 month
127.1.19.z = bounce rate, last 1 year

127.2.y.z: statements of known facts related to discovered characteristics

127.2.100.z: level of opt-in of mailings, with "z" = level of opt-in

(Note: 127.x.128.z - 127.x.255.z are reserved for cases where "z" is used for a subcategory rather than "how much" or "yes/no".)

127.2.128.z: Type of organization, with "z" = type
127.2.128.0 = ISP
127.2.128.1 = NSP
127.2.128.2 = Mailing List
127.2.128.3 = Merchant
127.2.128.4 = Bank
127.2.128.255 = unknown

127.2.129.z: country, with "z" = geographic location

127.2.130.z: rfc-compliance, with "z" = type of rfc-violations

127.2.255.z: external authentication, with "z" = type of authentication
127.2.255.1 = publishes SPF record
127.2.255.2 = publishes Microsoft "Sender I.D." record
127.2.255.101 = Participates in Habeas Sender Warranted Email
127.2.255.102 = Participates in Bonded Sender

127.3.100.z: level of opt-in of mailings, with "z" = level of opt-in
127.3.100.0 = has absolutely no mailing controls in place
127.3.100.1 = scrapes addresses, pure opt-out only
127.3.100.2 = accepts unverified sign-ups such as through web page
127.3.100.3 = accepts unverified sign-ups, gives chance to opt out
127.3.100.4 = adds only customer and inquirer email addresses to mailing list without opt-in, gives chance to opt out
127.3.100.5 = has opt-in mechanism available, used less than 50% of the time
127.3.100.6 = has opt-in mechanism available, used more than 50% of the time
127.3.100.7 = all mailing list mail is opt-in
127.3.100.8 = all mailing list mail is at least opt-in, and has confirmed (double) opt-in mechanism available, used less than 50% of the time
127.3.100.9 = all mailing list mail is at least opt-in, and has confirmed (double) opt-in mechanism available, used more than 50% of the time
127.3.100.10 = all mailing list mail is confirmed (double) opt-in
127.3.100.100 = the only email which comes from this IP address is mailing list email, and that mailing list email is entirely confirmed (double) opt-in

127.3.130.z: rfc-compliance, with "z" = type claimed

127.128.y.z and above are reserved for imputations, opinions, and assessments, as opposed to fact

127.128.y.z: statements of imputed facts related to observed characteristics

127.128.0.z: average volume of UBE, last 1 day, with "z" = "how much"

127.128.1.z = average volume of UBE, last 1 week
127.128.2.z = average volume of UBE, last 1 month
127.128.3.z = average volume of UBE, last 1 year

127.129.y.z: statements of imputed facts related to discovered characteristics

127.129.0.z: predicted volume of UBE, with "z" = "how much"

127.254.y.z: statements of rumors