Yes, it looks like Automattic has other IP addresses that they use.
http://whois.domaintools.com/209.15.21.83
http://whois.domaintools.com/66.155.11.18
Note: IP address: 14.99.54.86 is a hacker or spammer – Do NOT whitelist that IP address.
Note: BGP Toolkit by Hurricane Electric (various useful Tools): http://bgp.he.net/
Whitelist the additional Jetpack / Automattic CIDR blocks.
# XML-RPC DDoS & TRACKBACK/PINGBACK PROTECTION # Using this code blocks Pingbacks and Trackbacks on your website. # You can whitelist your IP address if you use A Weblog Client # or want to whitelist your IP address for any other reasons. # Example: uncomment #Allow from x.x.x. by deleting the # sign and # replace the x's with your actual IP address. Allow from 99.88.77. # Note: It is recommended that you use 3 octets x.x.x. of your IP address # instead of 4 octets x.x.x.x of your IP address. <FilesMatch "^(xmlrpc\.php|wp-trackback\.php)"> Order Deny,Allow # Whitelist Jetpack/ Automattic CIDR IP Address Blocks Allow from 192.0.64.0/18 Allow from 209.15.0.0/16 Allow from 66.155.0.0/17 Deny from all </FilesMatch>