"Anyone else seeing a ton of ips that start with 100 recently?
Like, what’s the deal? I’ve been noticing a bunch in my logs and it’s kinda weird.
Are these ips that start with 100 part of some special range or something? Or is it just me?
Also, are they safe? Or should I be worried?
Just curious if others are spotting this too. Maybe it’s some new ISP thing or cloud provider?
Thanks for any info!
(Also, sorry if this has been asked before—I did a quick search but didn’t find much.)"
Yeah, I've noticed ips that start with 100 popping up a lot lately too. Did some digging and found out they're part of the private IP range (100.64.0.0/10).
They're usually used by ISPs for carrier-grade NAT, so nothing to worry about. But if you're seeing them in weird places, maybe check your firewall logs.
Tools like whois or ipinfo.io can help trace them.
Wait, ips that start with 100? That’s not normal for regular home networks.
Sounds like CGNAT—common with mobile carriers or some ISPs. They’re safe, just annoying if you’re trying to track real users.
Try using a VPN or proxy checker if you’re paranoid.
lol yeah, same here. Tons of ips that start with 100 in my logs.
Did a quick lookup and it’s def CGNAT stuff. Mostly harmless but can mess with geo-location tools.
If you’re worried, block the whole 100.64.0.0/10 range and see what breaks.
Those ips that start with 100 are part of RFC 6598 (shared address space).
They’re legit, used for large-scale NAT by ISPs. No need to panic, but if you’re seeing them where you shouldn’t, might wanna check for misconfigs.
ip2location.com is handy for checking ranges.
Huh, interesting. I hadn’t noticed ips that start with 100 until now.
Just checked my logs and yep, there they are. Seems like it’s a thing with newer ISPs or cloud providers.
If you’re concerned, maybe set up a filter to flag them for review.
100.x.x.x ips are usually carrier-grade NAT.
They’re safe but can be a pain if you’re trying to identify individual users.
Try using a tool like AbuseIPDB to see if any are flagged for sketchy activity.
Yep, seeing ips that start with 100 everywhere lately.
It’s not just you—ISPs are using them more for IPv4 conservation.
If you’re logging them, might wanna exclude that range to clean up your data.
Wow, thanks for all the replies! Didn’t realize ips that start with 100 were so common.
I’ll check out those tools and maybe block the range if it gets noisy.
Good to know it’s not something shady. Appreciate the help!
Oh, those ips that start with 100? They’re from the CGNAT pool.
Totally normal, but can be confusing if you’re not expecting them.
If you wanna dig deeper, check out the IETF docs on shared addressing.
