really facebook?

I reloaded their app (yes, I know... sew me) and got this warning: IP address: 2600:100f:b119:c6bc:bd6f:fabb:ff30:2a3d Estimated location: Livingston, NJ, US Which seems pretty bizarre. I'm guessing they must be getting it from whois or something based on the address block for Verizon. The reverse map according to host 2600:100f:b119:c6bc:bd6f:fabb:ff30:2a3d comes back with NXDOMAIN. I suppose the real issue here is with Vz and why they don't have v6 reverse maps, but it did throw me thinking that somebody in New Jersey might have hacked my account. Mike