What is a proper accounting treatment for the purchase of a block of IP Addresses?

If you are going to re-sell them at some point in the future, you could argue that they are "inventory". However, your period end evaluation for obsolete items would be difficult to do. Although there are some sites that value web addresses.

If it for internal use, you should expense it. I don't see any rational for trying to amortize the cost over time.

If the amount is "small" or "immaterial" to your operations, best thing to do is expense it.

Thank you. Yes, IP Addresses are for internal use and the amount is material. If we decide to amortize, what is the common practice to determine the amortization period?