What is the difference between www.domain.com and domain.com?

The difference in coverage of www and non-www domains/subdomains is determined by technical features of a particular SSL product. Most of the certificates available on our website support automatic coverage of both www and non-www domains.

Special attention should be paid to Comodo multi-domain certificates, since they do not provide a bonus www or non-www SAN neither for the primary domain nor for additional domains, considering www.example.tld and example.tld two different domains.

The tables below represent www and non-www support for all SSL certificates offered by us.

Single Domain

SSL Product's Name

Common name in the CSR

(gTLD/ccTLD)

Coverage of both www and

non-www

PositiveSSL

EssentialSSL

InstantSSL

InstantSSL Pro

PremiumSSL

Comodo EV SSL

Comodo EV SSL SGC

www.example.com/co.uk

or

example.com/co.uk

www.sub.example.com/co.uk

or

sub.example.com/co.uk

Yes

 

 

Yes


Wildcard

SSL Product's name

Wildcard common name

in the CSR (gTLD/ccTLD)

“www”
coverage by the “*”
Bare domain “example.com/co.uk”
coverage

PositiveSSL Wildcard

EssentialSSL Wildcard

PremiumSSL Wildcard

 

*.example.com/co.uk

 

*.sub.example.com/co.uk

 

Yes 

 

 

Yes

Multi-Domain

SSL Product’s Name

Primary domain + 2 SANs

(gTLD/ccTLD)
Coverage

PositiveSSL Multi-Domain

Multi-Domain SSL

Unified Communications

EV Multi-Domain SSL

www.example.com/co.uk
www.example1.com/co.uk
www.example2.com/co.uk

example.com/co.uk
example1.com/co.uk
example2.com/co.uk

 

“www” only

 

“non-www” only

 

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