That's what you call cidr notation aka classes routing. Before cidr the smallest block you could get would have been 255.255.255.0 (cidr /24). With cidr we get smaller routing tables and better management of ip space. The routing prefix (/24, /25, /26, etc) denotes how many hosts are in a given prefix and the sizes are expressed in base 2. For example a /24 gives you 254 usable ips and 256 total with 1 being a network address and the other being a broadcast address. A /23 would 510 useable with 512 total with 1 being a network address and the other being a broadcast address. 2 /24s = 1 /23. 2 /23 = 1 /22.
Forgive me for properly answering his question. I'll revise my answer IT'S THEM MAGIC THINGS THAT MAKE ITERNETS WORK.
Haha thanks for the responses and resources. I get it now. Where do you guys purchase your IPs in bulk? There has to be better prices then http://www.seohosting.com/hosting-plans.php.
You can check out burstnet. You can pick up a /24 for 100 bucks a month. Just be prepared with a good justification.
100$ a month for a /24? At minimum, hosts charge $1 per ip. There are few commercial/consumer hosts that will lease a full /24 to you without prior relationships. 'Mailer Friendly' networks can typically charge anywhere from 2-6$ per IP address.
Can you expand on the "good justification."? Is mailing a good justification? I have a feeling it isn't.
Watch out with Burst. You're likely to get one of their 184.x.x.x boxes which is just plain beat to shit by every TLD mailer. For GI they're ok but if you wish to buld rep or do things properly it's a huge risk. Yeah $100 for a /24 is great, but you get what you pay for.
This is correct. If you want decent (TLD) ranges, you are going to have to pay market value for them. With many providers, if you do term commitments 3+ months you can get a bit better pricing on bulk block space. However, if you are doing month to month, are rotating ranges and what not, you are going to pay a premium for them. With some providers, you are going to pay $1500-2500.00 per month for a /24 if you want rotations and TLD clean IP's. Getting IP's in general is not a complicated thing. Getting GOOD IP's that deliver or are not blocked IS the key. :evil:
Those ranges are beaten to death. What's worse is, they are not picky with their clients. You could be on a range for 6 months getting your reputation and what not developed. You get it to the point of inbox gold and then some clown shoe comes in down the range, or on a neighboring range, and BAM you're toast. While this can happen at any carrier, most "mailer friendly" providers are more selective in their clients and try and space out the customers and ranges to prevent this when possible. Especially for the TLD guys who spend a lot of time and effort in developing a range over a period of months. :tee:
Some server providers will accept "bulk mailing" as justification, but those are usually the companies that you really don't want to be working with anyway. Simply think of reasons why you would use so many IPs and provide that as your justification. The more IPs you request, the more difficult the justification can be, but some of your most common responses to IP justification are things like: SSL Certificates, Name Servers, Firewall rules, Client IP Assignement, etc...
