There are slug groups like "fedex-group" that contain multiple slugs which belong to the same courier. Find the full list here.

slug_group is used to detect tracking when users can't provide a specific slug. For example, when users input "fedex-group" for slug_group, AfterShip will detect tracking with slugs that belong to "fedex".
The full list of slug_group and slug relations are as follow:

Enum

Include Slugs

fedex-group

fedex
opek
fedex-uk
fedex-fims
fedex-crossborder
fedex-freight

amazon-group

amazon
amazon-uk-api
amazon-fba-swiship

toll-group

toll-priority
toll-ipec
toll-nz

taqbin-group

taqbin-jp
taqbin-sg
taqbin-my
taqbin-hk
taqbin-taiwan

tnt-group

tnt
tnt-fr
tnt-uk-reference
tnt-reference
tnt-uk
tnt-it
tnt-click
tnt-au

cj-group

cj-malaysia-international
cj-korea-thai
cj-gls
cj-philippines
cj-malaysia
cjlogistics
cj-hk-international

hermes-group

hermes-de
myhermes-uk
hermes-2mann-handling
hermes-it
hermes
hrparcel

dpd-group

dpd
dpd-hungary
dpd-uk
dpd-de
dpd-ro
dpd-ireland
dpd-ru
dpd-hk
dpd-poland
dpd-fr-reference
exapaq

gls-group

gls-slovakia
gls
gls-italy
gls-cz
gls-da
gls-netherlands
gls-croatia
gls-spain
gls-slovenia
asm

fastway-group

fastway-ireland
fastway-nz
fastway-za
fastway-au

dhl-group

dhl
dhl-reference
dhl-hk
dhl-global-mail-asia
dhl-global-mail-asia-api
dhl-supply-chain-au
dhl-pieceid
dhl-poland
dhl-nl
dhl-global-mail
dhl-es
dhl-benelux
dhl-germany
dhl-active-tracing
dhlparcel-es
dhlparcel-nl
dhlparcel-uk

asendia-group

asendia-uk
asendia-usa
asendia-de
asendia-hk

postnl-group

postnl-international
postnl-3s
postnl

brt-group

brt-it-sender-ref
brt-it
brt-it-parcelid
brt-it-api

seur-group

international-seur
portugal-seur
spanish-seur
spanish-seur-api
international-seur-api