Just disable all the extensions in Safari first.
Then, if you can get to Facebook, renable them one by one and test after each till you can't get to Fb anymore. Then you know the culprit.
If after disabling all the extensions Fb is still unavailable, go to
and move everything out of that folder to a Temp folder on your desktop.
Restart Safari and see if the problem's solved. If yes, move those items back in one at a time and test after each till the problem recurs.
Thank you Linc. Hopefully these tests can provide some insight.
Step 1- Lookup
Lookup has started…
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 30590
;; flags: qr rd ra; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 3
;; QUESTION SECTION:
;facebook.com. IN ANY
;; ANSWER SECTION:
facebook.com. 39312 IN TXT "v=spf1 redirect=_spf.facebook.com"
facebook.com. 6770 IN A 126.96.36.199
facebook.com. 21153 IN NS b.ns.facebook.com.
facebook.com. 21153 IN NS a.ns.facebook.com.
facebook.com. 288 IN MX 10 smtpin.mx.facebook.com.
;; ADDITIONAL SECTION:
a.ns.facebook.com. 17260 IN A 188.8.131.52
b.ns.facebook.com. 17346 IN A 184.108.40.206
smtpin.mx.facebook.com. 85 IN A 220.127.116.11
Received 201 bytes from 192.168.2.1#53 in 25 ms
Step 2- Ping
Ping has started…
PING www.facebook.com (18.104.22.168): 56 data bytes
Request timeout for icmp_seq 0
Request timeout for icmp_seq 1
Request timeout for icmp_seq 2
Request timeout for icmp_seq 3
Request timeout for icmp_seq 4
Request timeout for icmp_seq 5
Request timeout for icmp_seq 6
Request timeout for icmp_seq 7
Request timeout for icmp_seq 8
--- www.facebook.com ping statistics ---
10 packets transmitted, 0 packets received, 100.0% packet loss
Then it's a problem with your ISP's servers. You can bypass them by entering the public DNS servers of your choice, either in the router (in which case all devices on the network will use them) or in the Network preference pane (in which case only that Mac will use them.) For example, you could use Level 3 DNS:
That's an example, not an endorsement. There's a slight chance your ISP might block those servers, in which case you'll have to use something else.
Here's a curveball- I also cannot access facebook when I use my iPhone as a hotspot, and thus from a different IP address (whether it's Wi-Fi, bluetooth or USB connection). Also, I couldn't access facebook via a different ISP (Time Warner) in Los Angeles, and I am now in Chicago on Comcast having the same problem. Which leads me to believe it's a problem with some kind of file(s) on this computer, and not an ISP failure. Let me know what you think. Thanks.
# Host Database
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.