Similar to 正引きで確認された逆引きDNSエントリ

Finger (protocol)

HTTPS

IMessage

Interior gateway protocol

Interior Gateway Routing Protocol

Internet Protocol Control Protocol

Internet Storage Name Service

Lightweight Directory Access Protocol

Link Control Protocol

LISTSERV

Micro Transport Protocol

NAT-T

NETCONF

Network Control Protocol (PPP)

Network Security Services

OAuth

Online Certificate Status Protocol

Point-to-Point Tunneling Protocol

QUIC

Quoted-printable

Real-Time Media Flow Protocol

Real-Time Messaging Protocol

Berkeley r-commands

Serial Line Internet Protocol

Session Announcement Protocol

Session Description Protocol

Simple Authentication and Security Layer