Can you open sip.voip.blackberry.com:443 from mainland China?
N/A.
This domain doesn't resolve anywhere we test — including our control outside mainland China — so it appears inactive or unregistered rather than blocked.
2013first tested
21 d agolast tested
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Frequently asked questions
Is sip.voip.blackberry.com:443 blocked in mainland China right now?
As of the last test on 2026-07-09, sip.voip.blackberry.com:443 is not resolvable from anywhere we test in mainland China, based on GreatFire's live Great Firewall measurements.
http://sip.voip.blackberry.com:443 · JSON