I’m going to assume you are referring to finding the name and or phone number of a street address in the USA. If you are asking how to reverse an IP address, that is something completely different but also available.Reversing a physical address to obtain the associated name that either lives there, works there, or is the owner all have different outcomes. If the address is a single family residence like a detached house it’s usually more accurate or not as difficult if the address were an office building with many suites or an apartment building with a lot of apartments.If for example your address is a New York City apartment building with hundreds of apartments and there are no separate utilities or there are apartment numbers with fractions in the number or where there is more than one apartment with the same number (just a letter added) like 256 3rd Ave apartment 3b or 256 1/2 85th St.Often times people that don’t want to be found may leave off the 1/2 or the letter of the apartment on public records or official documents that make their way into marketing company databases which are often sold, or used in algorithms to make data more meaningful.If you are purchasing address lists, scraping them from the internet, or getting them from customer registrations, etc.. it is important to verify they are valid addresses. Just because you buy or rent a list does not mean that the addresses are correct, checked, updated, or "certified." One of the first things to do is to make sure the address is a real deliverable address. The most accurate and free way to validate an address is deliverable is to use the usps website here. While it’s not the best interface and you can only check one address at a time, it works and it’s free. If you want a bulk tool to validate addresses you may have to pay a small fee.Once you know the address is legit, you can try to uncover more information about that address. Trying to get the name, phone number, or email address from a physical address that isn’t valid is a waste of time.Depending on the type of reverse address lookup you need, there are many options. Simply typing the address into Google, Bing or any other search engine could reveal some useful info. I would also recommend entering the address into social media search sites like Facebook, Yelp, Linkedin, etc. Sometimes you can get lucky and get some info. While that info may not be current or accurate, sometimes you can get lucky. There are so many ways to conduct a reverse address search that it comes down to whether you want to spend your time or your money finding the information. While finding it for free is great, how much time did it take you and what could you have done with that time instead?A better question is what’s the most accurate way to conduct a reverse address lookup. The answer to that is multipart.Again, you can try free online address lookups but the info could be old, stale, historical. While it might not be accurate, it will give you a picture of the info from that address. You might find old phone numbers, names, and email addresses and you may even get some current published listings so that would be nice and easy and free. But how do you know the data is accurate? Would you hire a process service or pay someone to deliver something to the person at the address you found for free? Probably not without verifying the info is accurate.Public records also called “premium records” is another option. Usually these address records are more accurate but have not been verified as such. So while it’s still relatively inexpensive to get the names, aliases, phone numbers, or email addresses from an address, the accuracy may not be 100%. But the cost is relatively inexpensive, you can search both individual addresses and big lists (batch appends) and it doesn’t take a lot of time so this is a reasonable compromise to finding good information.Note that some companies offer inexpensive non-recurring people search memberships but be careful of other companies that may try to trick you into a monthly subscription without knowing if they really found the information you’re looking for or not.Lastly, if you want accurate or verified information, it may require hiring a professional. There are several websites that offer assisted searches or Private investigator services. This type of reverse address lookup is the most expensive, takes the longest, but is the most accurate. It’s often called a Utility Search for landline phone service or Utility Billing Contact info for gas, electric, or other utilities search since the only info you have is an address and you want to find out who is at that address. The best way for an investigator to find out who is residing at a particular address is to find out who is paying for the utilities at that address. While the results might be a landlord, investigators can sometimes find out tenant information using investigative prowess.The same goes for trying to reverse a PO Box address or a PMB (Private or Personal Mailbox - like a UPS store). More often the best way to find the real address and info from a POB is to opt for an assisted search.Hope that answers your question.