> When two companies merge there is now an IP range overlap and a renumbering has to be done.
That has nothing to do with OP's question about consumer internet concerns. However, I've been through several corporate acquisitions. The thing that took the longest to work out? Getting the new company's name on the paychecks.
The thing that took the second longest to work out? Renumbering networks and consolidating and decommissioning hardware for which there just wasn't enough RFC 1918 space available. Every. Damn. Time. this process dragged on and on and on, when IT could have saved 6->18+ months of future work [0] by generating a /48 ULA and using that for every internal thing but the stuff that was IPv4-only.
[0] ...and god only knows how many dollars in labor costs...
That has nothing to do with OP's question about consumer internet concerns. However, I've been through several corporate acquisitions. The thing that took the longest to work out? Getting the new company's name on the paychecks.
The thing that took the second longest to work out? Renumbering networks and consolidating and decommissioning hardware for which there just wasn't enough RFC 1918 space available. Every. Damn. Time. this process dragged on and on and on, when IT could have saved 6->18+ months of future work [0] by generating a /48 ULA and using that for every internal thing but the stuff that was IPv4-only.
[0] ...and god only knows how many dollars in labor costs...