AS21928 T-Mobile USA, Inc.

Abuse reported against IP addresses announced by autonomous system 21928. If you run this network, the addresses below are a good place to start an abuse investigation.

In the last 30 days, 263 IP addresses in AS21928 T-Mobile USA, Inc. were reported for abuse, in 728 reports altogether. None of them has a confidence score high enough for the default blocklist yet. The most common reasons were Bad Web Bot, SSH and Malware Distribution. Most of them are in United States.

263addresses reported, 30 days

0on the default blocklist (75+)

728reports against them

56 minsince the latest report

Most reported addresses

Address	Score	Reports	Categories	Last seen
🇺🇸172.56.107.252	71	8	DNS Poisoning Web Spam Port Scan Hacking SQL Injection Bad Web Bot Exploited Host Web App Attack SSH Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	56 min
🇺🇸172.56.105.120	60	4	DNS Poisoning Web Spam Port Scan Hacking SQL Injection Bad Web Bot Exploited Host SSH Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.65.1	48	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.32.39	48	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.164.48	48	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.59.25.119	47	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	2 h
🇺🇸172.56.73.211	47	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	2 h
🇺🇸172.56.69.151	47	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	2 h
🇺🇸172.56.27.37	47	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	2 h
🇺🇸172.56.213.94	47	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	2 h
🇺🇸172.56.101.0	47	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	2 h
🇺🇸172.59.69.250	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.59.172.116	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.182.40	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.59.169.247	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.76.169	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.35.173	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.32.60	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.56.217.29	46	4	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h
🇺🇸172.59.64.58	42	3	DNS Poisoning Phishing Web Spam Email Spam Port Scan SQL Injection Spoofing Bad Web Bot Exploited Host SSH Mail Server Attack Vulnerability Scan Malware Distribution Command & Control API Abuse Fake Accounts Telnet Abuse	6 h

What they were reported for

Where they are

🇺🇸 United States263

Block them

The blocklist holds every address with a confidence of 75 or more, in nine formats for firewalls, web servers and SIEMs. Download it with a free API key:

curl -s "https://isipsafe.com/api/v1/blocklist?key=$ISIPSAFE_KEY&format=txt"

See the integration guides for nginx, fail2ban, pfSense, MikroTik and more, or the API reference.

Figures cover the last 30 days and are refreshed hourly; last updated 2 minutes ago.