Here's a dig from my machine...
; <<>> DiG 9.6.0-APPLE-P2 <<>> api.smugmug.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47106
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;api.smugmug.com. IN A
;; ANSWER SECTION:
api.smugmug.com. 300 IN CNAME api.smugmug.com.edgekey.net.
api.smugmug.com.edgekey.net. 19576 IN CNAME e1023.c.akamaiedge.net.
e1023.c.akamaiedge.net. 20 IN A 72.246.148.79