IP address 151.251.148.121

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Overview

LocationCity, region and country where this IP is located.
Sofia, Sofia City, BG
ASNThe autonomous system that announces this IP on the internet.
AS29580 — A1 Bulgaria EAD
TimezoneThe IANA time zone at this IP's location.
Europe/Sofia
NetworkThe routed network block (CIDR) that contains this IP.
151.251.148.0/22
CompanyThe organization this IP is assigned to.
A1 Bulgaria EAD
Abuse contactWhere to report spam, attacks or other misuse from this IP.
ripe.abuse@a1.bg

Associated location

Sofia

Sofia City, Bulgaria (BG)

Powered byIP Geolocation API

City
Sofia
District / county
Sofia-City
State / province
Sofia City
Country
Bulgaria
Postal code
1000
Coordinates
42.69718, 23.32433

Bulgaria

42.69718, 23.32433

© Google Maps

Threat score

45/100 Medium risk

Powered byIP Security API

Flags detected

  • AnonymousTraffic from this IP hides its real origin (VPN, proxy or Tor).Detected
  • Known AttackerThis IP has been seen in attacks such as brute force, scanning or exploits.Not Detected
  • SpamThis IP has been reported for sending spam.Not Detected
  • TorThis IP is a Tor exit node.Not Detected
  • ProxyThis IP is an open, public or commercial proxy.Detected
    Residential ProxyA home or mobile connection resold as a proxy exit.Detected
  • BotAutomated traffic such as crawlers or scrapers comes from this IP.Not Detected
    Known Good BotThis bot is a known, legitimate crawler, such as a search engine.Not Detected
  • VPNThis IP belongs to a VPN service.Not Detected
  • Cloud ProviderThis IP belongs to a cloud or hosting provider's data center.Not Detected
  • Corporate GatewayA shared egress gateway used by a company's network.Not Detected
  • RelayThis IP is a relay exit, such as iCloud Private Relay.Not Detected

Proxy

Detected
Residential Proxy
Provider Names
Proxy-Seller
Confidence Score
80 %
Last Seen
2026-09-03
Providers (30d)Number of distinct proxy providers associated with this IP in the last 30 days.
0
Active Days (30d)Number of days in the last 30 days this IP was observed acting as a proxy.
0
Active Days (7d)Number of days in the last 7 days this IP was observed acting as a proxy.
0

Abuse contact

A1 Bulgaria EAD Abuse

ripe.abuse@a1.bg

Powered byIP Abuse Contact API

Name
A1 Bulgaria EAD Abuse
Organization
ORG-MN1-RIPE
Network
151.251.144.0/21
Country
BG
Kind
group
Address
1 Kukush Str. 1345, Sofia, Bulgaria
Emails
ripe.abuse@a1.bg
Phone numbers
+3592881103540

Autonomous system

AS29580

A1 Bulgaria EAD

Powered byIP to ASN Database

ASN
AS29580
Country
BG
Domain
a1.bg
Regional registry
RIPE
Organization
A1 Bulgaria EAD
Type
Internet service provider (ISP)
Allocated on
2003-10-15

Organization

A1 Bulgaria EAD

AS29580 a1.bg ISP BG

Associated company

A1 Bulgaria EAD

ISP · a1.bg

Powered byIP to Company Database

Name
A1 Bulgaria EAD
Type
Internet service provider (ISP)
Domain
a1.bg

Network route

151.251.148.0/22

Fiber

Powered byIP Geolocation API

Hostname
151.251.148.121
Route
151.251.148.0/22
Connection type
Fiber
Anycast
No
CDN
No
CDN provider
—

Time zone

Europe/Sofia

2026-11-10 07:50

Powered byTime Zone API

Offset from UTC
2.0
Standard time zone
Eastern European Standard Time
Standard abbreviation
EET
Daylight saving time
Yes
DST savings (hours)
0
Observing DST now
No
Sofia

Europe/Sofia

UTC2.0

User agent string

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)

Powered byUser Agent API

  • BrowserClaudeBotver. 1.0
  • EngineClaudeBotver. 1.0
  • Operating systemCloud
  • DeviceRobotAnthropic ClaudeBot
  • ArchitectureUnknown
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
Response 
{
  "ip" : "151.251.148.121",
  "hostname" : "151.251.148.121",
  "location" : {
    "continent_code" : "EU",
    "continent_name" : "Europe",
    "country_code2" : "BG",
    "country_code3" : "BGR",
    "country_name" : "Bulgaria",
    "country_name_official" : "Republic of Bulgaria",
    "country_capital" : "Sofia",
    "state_prov" : "Sofia City",
    "state_code" : "BG-22",
    "district" : "Sofia-City",
    "city" : "Sofia",
    "locality" : "Sofia",
    "accuracy_radius" : "14.561",
    "confidence" : "medium",
    "dma_code" : "",
    "zipcode" : "1000",
    "latitude" : "42.69718",
    "longitude" : "23.32433",
    "is_eu" : true,
    "country_flag" : "https://ipgeolocation.io/static/flags/bg_64.png",
    "geoname_id" : "727011",
    "country_emoji" : "🇧🇬"
  },
  "country_metadata" : {
    "calling_code" : "+359",
    "tld" : ".bg",
    "languages" : [ "bg", "tr-BG", "rom" ]
  },
  "network" : {
    "connection_type" : "Fiber",
    "route" : "151.251.148.0/22",
    "is_anycast" : false,
    "is_cdn" : false,
    "cdn_provider_name" : ""
  },
  "currency" : {
    "code" : "BGN",
    "name" : "Bulgarian Lev",
    "symbol" : "лв"
  },
  "asn" : {
    "as_number" : "AS29580",
    "organization" : "A1 Bulgaria EAD",
    "country" : "BG",
    "type" : "ISP",
    "domain" : "a1.bg",
    "date_allocated" : "2003-10-15",
    "rir" : "RIPE"
  },
  "company" : {
    "name" : "A1 Bulgaria EAD",
    "type" : "ISP",
    "domain" : "a1.bg"
  },
  "security" : {
    "threat_score" : 45,
    "is_tor" : false,
    "is_proxy" : true,
    "proxy_provider_names" : [ "Proxy-Seller" ],
    "proxy_confidence_score" : 80,
    "proxy_last_seen" : "2026-09-03",
    "proxy_days_seen_30d" : 0,
    "proxy_days_seen_7d" : 0,
    "proxy_provider_count_30d" : 0,
    "is_residential_proxy" : true,
    "is_vpn" : false,
    "vpn_provider_names" : [ ],
    "vpn_confidence_score" : 0,
    "vpn_last_seen" : "",
    "is_relay" : false,
    "relay_provider_name" : "",
    "is_anonymous" : true,
    "is_known_attacker" : false,
    "is_bot" : false,
    "bot_confidence_score" : 0,
    "bot_operator_name" : "",
    "bot_type" : "",
    "is_known_good_bot" : false,
    "bot_last_seen" : "",
    "is_spam" : false,
    "is_cloud_provider" : false,
    "cloud_provider_name" : "",
    "is_corporate_gateway" : false,
    "corporate_gateway_type" : "",
    "corporate_gateway_provider_name" : ""
  },
  "abuse" : {
    "route" : "151.251.144.0/21",
    "country" : "BG",
    "name" : "A1 Bulgaria EAD Abuse",
    "organization" : "ORG-MN1-RIPE",
    "kind" : "group",
    "address" : "1 Kukush Str. 1345, Sofia, Bulgaria",
    "emails" : [ "ripe.abuse@a1.bg" ],
    "phone_numbers" : [ "+3592881103540" ]
  },
  "time_zone" : {
    "name" : "Europe/Sofia",
    "offset" : 2,
    "offset_with_dst" : 2,
    "current_time" : "2026-11-10 07:50:33.887+0200",
    "current_time_unix" : 1.794289833887E9,
    "current_tz_abbreviation" : "EET",
    "current_tz_full_name" : "Eastern European Standard Time",
    "standard_tz_abbreviation" : "EET",
    "standard_tz_full_name" : "Eastern European Standard Time",
    "is_dst" : false,
    "dst_savings" : 0,
    "dst_exists" : true,
    "dst_tz_abbreviation" : "EEST",
    "dst_tz_full_name" : "Eastern European Summer Time",
    "dst_start" : {
      "utc_time" : "2027-03-28 TIME 01:00",
      "duration" : "+1.00H",
      "gap" : true,
      "date_time_after" : "2027-03-28 TIME 04:00",
      "date_time_before" : "2027-03-28 TIME 03:00",
      "overlap" : false
    },
    "dst_end" : {
      "utc_time" : "2027-10-31 TIME 01:00",
      "duration" : "-1.00H",
      "gap" : false,
      "date_time_after" : "2027-10-31 TIME 03:00",
      "date_time_before" : "2027-10-31 TIME 04:00",
      "overlap" : true
    }
  },
  "user_agent" : {
    "user_agent_string" : "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)",
    "name" : "ClaudeBot",
    "type" : "Robot",
    "version" : "1.0",
    "version_major" : "1",
    "device" : {
      "name" : "Anthropic ClaudeBot",
      "type" : "Robot",
      "brand" : "Anthropic",
      "cpu" : "Unknown"
    },
    "engine" : {
      "name" : "ClaudeBot",
      "type" : "Robot",
      "version" : "1.0",
      "version_major" : "1"
    },
    "operating_system" : {
      "name" : "Cloud",
      "type" : "Cloud",
      "version" : "??",
      "version_major" : "??",
      "build" : "??"
    }
  }
}

Evaluation Checklist

Behind the address

What the data tells you about 151.251.148.121.

Who operates 151.251.148.121?

A1 Bulgaria EAD operates AS29580, the autonomous system announcing this address. The associated company is A1 Bulgaria EAD; the reported network is 151.251.148.0/22.

View ASN API

Why can its location change?

IP location comes from routing, registry and measurement data. It can shift when A1 Bulgaria EAD reassigns the block, so treat Sofia as an estimate, not a fixed point.

View IP Geolocation API

How do I report abuse?

The listed abuse contact is A1 Bulgaria EAD Abuse. Include the source IP, timestamps with a timezone, and relevant logs so the contact can investigate.

View Abuse Contact API

For developers

The same data. One API request.

Add IP location, network, and security data to your application.

cURL 
curl --get 'https://api.ipgeolocation.io/v3/ipgeo' \
  --data-urlencode 'apiKey=YOUR_API_KEY' \
  --data-urlencode 'ip=151.251.148.121' \
  --data-urlencode 'include=*'
Response 
{ "ip": "151.251.148.121" }

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Frequently Asked Questions

The latest lookup maps 151.251.148.121 to Sofia, Sofia City, Bulgaria. Geolocation is approximate and should be treated as city/region level guidance.
This page currently shows ASN AS29580 and company A1 Bulgaria EAD. ASN and company attribution can change as routing and ownership records are updated.
The reported connection type for 151.251.148.121 is Fiber. This value helps with traffic analytics, abuse prevention, and policy routing decisions.
The current timezone record for 151.251.148.121 is Europe/Sofia. Teams commonly use this signal to localize timestamps, notifications, and fraud models.
IP intelligence is dynamic. Routing, ASN ownership, company names, and security posture can change over time, so this page should be treated as a point-in-time lookup for 151.251.148.121.
Use the JSON response on this page for testing, then move to production API workflows with structured fields for geolocation, network, ASN, security, abuse, and timezone data. Read documentation.