Network Utilities

IP Lookup, CIDR Calculator, MAC Address Lookup, and Port Number Lookup
Examples:

IP Address Information

Located in Lancaster, United States
216.73.216.137
IP Address 216.73.216.137
Hostname 216.73.216.137
City Lancaster
Region California
Country United States
Phone Code 1
Geo Location 34.6906,-118.1417
Organization Charter Communications Inc
ASN Number 20001
API Call

Get JSON results via command line with either curl or wget.

Try it:
curl "https://steamr.com/216.73.216.137" 

{
    "ip": "216.73.216.137",
    "hostname": "216.73.216.137",
    "city": "Lancaster",
    "region": "California",
    "country": "US",
    "country_name": "United States",
    "phone_code": "1",
    "location": "34.6906,-118.1417",
    "postal": "93534",
    "organization": "Charter Communications Inc",
    "asn": 20001
}