Similar to HTTPステータスコード

Locator/Identifier Separation Protocol

Loopt

Low-Level Reader Protocol

.lr

.ls

.lu

.lv

.ly

Mailto

Match.com

MathWorld

Maximum transmission unit

.mc

.me

.mg

Miraheze

.mk

.ml

.mm

.mn

.mo

.mp

.mq

.mr

.ms

MSN

.mt

.mu