We receive an alert on a server, a suspicious behavior in the logs, or simply a geolocated access denied from abroad. The reflex is to copy-paste the IP address into a search engine. For an IP like 37.117.117.230, associated with the Vodafone Italia network, the process seems simple. In practice, the results vary from one tool to another, and legal limits frame what can actually be obtained.
Whois RIPE NCC: the source that public tools ignore
Most IP geolocation services rely on commercial databases like MaxMind or IP2Location. These databases provide a likely city, a postal code, a time zone. For 37.117.117.230, you generally get a location in Emilia-Romagna, Italy, with Vodafone Italia DSL as the internet service provider.
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These results remain approximate. Consulting the RIPE NCC whois directly allows access to additional data that standard tools do not display: the name of the local internet registry (LIR), abuse contacts, exact address ranges assigned, and usage policies declared by the operator.
Specifically, you go to the RIPE NCC website, enter the IP address in the whois search field, and obtain the complete network block. To find information on IP 37.117.117.230 via Info 11, you can also use an aggregator that compiles this data into a more readable interface.
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The RIPE whois does not provide the subscriber’s name. It identifies the operator, the network range, and the technical contact point. This is the basis for any serious investigation into a European IP address.
Dynamic IP Vodafone: why geolocation varies by tool
37.117.117.230 is a dynamic IP address assigned by Vodafone Italia to its residential subscribers. A dynamic IP regularly changes its holder, sometimes several times a day. The result of a geolocation only reflects a probable situation at a given moment.
Significant discrepancies are observed between tools. One service shows Medolla, another Castelnuovo Rangone, a third simply indicates the Emilia-Romagna region without specifying a city. The returns vary on this point depending on the freshness of the database used.
This variability has a technical explanation. Geolocation databases map address blocks based on operator declarations and network measurements. When a block is shared between several geographical areas of the same ISP, the location fluctuates between the covered cities.
What we get that is reliable and what remains vague
- The country (Italy) and the region (Emilia-Romagna) are reliable, with a very high level of confidence on most services
- The exact city varies from one tool to another and should not be considered definitive for a public dynamic IP
- The ISP (Vodafone Italia DSL) and the AS number (autonomous system) are constant, as they depend on the RIPE registry and not on an estimate
- The reverse DNS hostname (net-37-117-117-230.cust.vodafonedsl.it) confirms the belonging to the Vodafone network and remains stable as long as the block is assigned
GDPR and IP addresses: the legal limits of online research
Since the implementation of the GDPR, IP addresses are considered personal data by the CNIL and the European Data Protection Board. This legal qualification has direct consequences on what an online tool can display.
Public IP search services voluntarily limit themselves to the AS, the internet service provider, and an approximate location. No personal data, no precise postal address. Serious platforms log searches and regulate access to their results.
To go beyond this public information (identifying the individual behind an IP at a specific moment), one must go through a judicial requisition addressed to the ISP. Only Vodafone Italia, in the case of 37.117.117.230, has the correspondence between the IP, timestamp, and subscriber identity.
Activity history and IP reputation: cybersecurity tools
Classic IP search engines show a snapshot. In cybersecurity, there is often a need to know whether an IP address has been involved in malicious activities in the past: spam, brute force attempts, participation in a botnet.
Specialized services track the past activity of IP addresses. They provide information such as presence on blacklists, history of abuse reports, or open ports detected during network scans.
Useful checks for a suspicious IP
- Query the main blacklists (DNSBL) to see if the IP has been reported for spam or phishing
- Check open ports via a network scanner to identify any exposed services
- Consult reputation databases that aggregate community reports and threat intelligence feeds
- Cross-reference the reverse DNS hostname with hosted domains when a web server is active on the IP
For 37.117.117.230, no active website has been detected on HTTP and HTTPS ports by public scanning tools. This is consistent with a residential Vodafone IP, used for regular browsing.
Obtaining information about an IP address like 37.117.117.230 remains accessible as long as you cross-reference multiple sources: RIPE whois for network data, geolocation tools for approximate location, reputation databases for history. The accuracy always depends on the type of IP. For a residential dynamic address, the exact city will remain an estimate, and the user’s identity will be protected by the European legal framework.