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ASN REPORT — AS21928 · T-Mobile USA, Inc.

First sighted: July 16, 2023, 3 a.m. · Last sighted: Feb. 23, 2026, 2 a.m.

Risk
56 (med)
Total hits
26108
Total errors
5135
Observed IPs
9548
Top country
United States
Top city
Yorktown
Top region
Wisconsin

Risk

Model: v1 Computed: 2026-02-27 17:09:49
Risk score
56
Medium
Risk gradient
Key drivers are enriched against the published annotator catalog when available; otherwise sensible defaults are used.
Key drivers
Credential brute forcing
Repeated authentication attempts consistent with password guessing or credential stuffing.
cred
Hits 397
Points 1299.10
Request size anomaly
Requests are unusually large or shaped in a way that suggests abuse or automation.
request_size
Hits 1458
Points 348.36
Scan velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
scan_velocity
Hits 194
Points 177.48
User-Agent anomaly
User-Agent signals look missing, inconsistent, or indicative of non-browser tooling.
ua
Hits 1132
Points 137.12
Sensitive file probing
Requests target commonly sensitive files, configs, backups, or administrative resources.
sfp
Hits 6
Points 47.52
Automated client behavior
Traffic patterns strongly suggest automation rather than a human-operated browser.
bot
Hits 31
Points 15.50
Protocol anomaly
Request structure or protocol-level signals deviate from typical browser HTTP traffic.
proto
Hits 5
Points 3.76
Referrer abuse
Referrer patterns look manipulated, irrelevant, or inconsistent with normal navigation.
ref
Hits 1
Points 0.18

Traffic

Rollup

Daily activity (hits per day) and basic HTTP rollup counters for this ASN.

Loading activity…
Daily activity (hits per day). Total in window: —.
Traffic rollup
HTTP status classes, URL diversity, and totals.
2xx
20973
3xx
0
4xx
5135
5xx
0
Unique URLs
0
Total hits
26108
First seen
July 16, 2023, 3 a.m.
Last seen
Feb. 23, 2026, 2 a.m.

Annotators (All-time)

Heatmap of annotator × severity. Darker cells mean more volume in that band. Tip: switch to Weighted points to see what drives impact (not just noise).

Severity →
Low High
Credential brute forcing cred
Repeated authentication attempts consistent with password guessing or credential stuffing.
hits 397 pts 1299.10
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 139 136 764.50 Dec. 7, 2024, 10:12 a.m. Feb. 22, 2026, 11:19 p.m. —
8 117 117 514.80 March 25, 2025, 2:21 a.m. Feb. 22, 2026, 11:19 p.m. —
12 3 1 19.80 Dec. 7, 2024, 10:12 a.m. Dec. 7, 2024, 10:12 a.m. —
0 138 136 0.00 Dec. 7, 2024, 10:12 a.m. Feb. 22, 2026, 11:19 p.m. —
Request size anomaly request_size
Requests are unusually large or shaped in a way that suggests abuse or automation.
hits 1458 pts 348.36
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
12 470 168 338.40 Nov. 14, 2024, 10:05 p.m. Nov. 6, 2025, 7:21 a.m. —
14 9 7 7.56 May 28, 2025, 3:47 p.m. Feb. 21, 2026, 8:52 a.m. —
20 2 1 2.40 Feb. 24, 2025, 2:38 a.m. Feb. 24, 2025, 2:38 a.m. —
0 977 241 0.00 Dec. 26, 2024, 12:57 a.m. Nov. 6, 2025, noon —
Scan velocity scan_velocity
High request rate and broad endpoint coverage suggest scanning or automated enumeration.
hits 194 pts 177.48
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 92 27 165.60 Oct. 1, 2024, midnight Aug. 16, 2025, 11:02 p.m. —
12 3 2 6.48 Feb. 14, 2025, 12:01 a.m. April 16, 2025, 7:55 p.m. —
16 1 1 2.88 Feb. 14, 2025, 12:01 a.m. Feb. 14, 2025, 12:01 a.m. —
14 1 1 2.52 Feb. 14, 2025, 12:01 a.m. Feb. 14, 2025, 12:01 a.m. —
0 97 27 0.00 Oct. 1, 2024, midnight Aug. 16, 2025, 11:02 p.m. —
User-Agent anomaly ua
User-Agent signals look missing, inconsistent, or indicative of non-browser tooling.
hits 1132 pts 137.12
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
6 1116 259 133.92 Sept. 25, 2023, 3:36 a.m. Dec. 21, 2025, 11:05 p.m. —
10 16 1 3.20 Nov. 7, 2024, 6:35 a.m. Nov. 7, 2024, 11:44 a.m. —
Sensitive file probing sfp
Requests target commonly sensitive files, configs, backups, or administrative resources.
hits 6 pts 47.52
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
40 5 5 44.00 Jan. 28, 2026, 3:57 p.m. Jan. 31, 2026, 10:47 p.m. —
16 1 1 3.52 Jan. 31, 2026, 10:47 p.m. Jan. 31, 2026, 10:47 p.m. —
Automated client behavior bot
Traffic patterns strongly suggest automation rather than a human-operated browser.
hits 31 pts 15.50
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
10 31 17 15.50 Jan. 5, 2024, 2:45 a.m. Nov. 6, 2025, 7:21 a.m. —
Protocol anomaly proto
Request structure or protocol-level signals deviate from typical browser HTTP traffic.
hits 5 pts 3.76
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
11 4 3 3.52 May 6, 2025, 12:33 a.m. Feb. 12, 2026, 11:16 p.m. —
3 1 1 0.24 Dec. 21, 2025, 11:05 p.m. Dec. 21, 2025, 11:05 p.m. —
Referrer abuse ref
Referrer patterns look manipulated, irrelevant, or inconsistent with normal navigation.
hits 1 pts 0.18
Breakdown by severity band (all-time). “Weighted” reflects your weight configuration.
Severity Total Labels Weighted First seen Last seen Top labels
6 1 1 0.18 March 25, 2025, 2:21 a.m. March 25, 2025, 2:21 a.m. —

HTTP Status Breakdown

Response mix grouped by status class (2xx/3xx/4xx/5xx). Auto-loads a single aggregation and renders a donut.

Loading status mix…
Running one aggregation and rendering the chart.

Geolocation

Live geolocation and map tiles auto-load for this ASN snapshot (peer IPs with coordinates).

Loading map…

SUBNETS HELD BY THIS ISP

Derived from ISP snapshot peers (Option A). Grouped into IPv4 /24 and IPv6 /48 by default.
IPv4
IPv6
Limit
Loading subnets…

Interesting IPs

Top risky peers inside this ASN (latest snapshot). Sorted by risk score, then hits.

172.59.160.194 low
Open report
2 /100
Last seen 2025-08-17 03:00
Hits
373
Errors
7
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.151.98 low
Open report
2 /100
Last seen 2025-03-17 02:00
Hits
269
Errors
93
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.13.235 low
Open report
1 /100
Last seen 2024-11-07 02:00
Hits
548
Errors
6
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.166.46 low
Open report
1 /100
Last seen 2025-05-26 03:00
Hits
305
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.189.170 low
Open report
1 /100
Last seen 2025-04-17 03:00
Hits
274
Errors
13
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.47.106 low
Open report
1 /100
Last seen 2025-02-14 02:00
Hits
267
Errors
158
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.79.164 low
Open report
1 /100
Last seen 2025-02-26 02:00
Hits
227
Errors
101
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.10.123 low
Open report
1 /100
Last seen 2025-02-27 02:00
Hits
205
Errors
56
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.185.249 low
Open report
1 /100
Last seen 2026-02-05 02:00
Hits
195
Errors
3
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.182.253 low
Open report
1 /100
Last seen 2025-03-22 02:00
Hits
184
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.173.159 low
Open report
1 /100
Last seen 2024-10-01 03:00
Hits
139
Errors
62
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.226.126 low
Open report
1 /100
Last seen 2025-08-11 03:00
Hits
79
Errors
4
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.42.219 low
Open report
1 /100
Last seen 2025-03-24 02:00
Hits
76
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.161.208 low
Open report
1 /100
Last seen 2025-08-25 03:00
Hits
68
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.167.118 low
Open report
0 /100
Last seen 2024-11-16 02:00
Hits
232
Errors
6
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.167.139 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
143
Errors
2
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.210.3 low
Open report
0 /100
Last seen 2025-04-02 03:00
Hits
141
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.12.193 low
Open report
0 /100
Last seen 2024-11-08 02:00
Hits
136
Errors
4
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.240.106 low
Open report
0 /100
Last seen 2024-11-09 02:00
Hits
119
Errors
17
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.13.89 low
Open report
0 /100
Last seen 2024-11-07 02:00
Hits
111
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.73.82 low
Open report
0 /100
Last seen 2024-01-20 02:00
Hits
103
Errors
54
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.166.223 low
Open report
0 /100
Last seen 2024-11-15 02:00
Hits
95
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.153.181 low
Open report
0 /100
Last seen 2025-01-13 02:00
Hits
94
Errors
19
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.16.108 low
Open report
0 /100
Last seen 2025-08-02 03:00
Hits
93
Errors
4
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.229.175 low
Open report
0 /100
Last seen 2026-01-21 02:00
Hits
93
Errors
39
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.32.206 low
Open report
0 /100
Last seen 2025-07-27 03:00
Hits
92
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.15.74 low
Open report
0 /100
Last seen 2024-10-01 03:00
Hits
85
Errors
29
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.146.213 low
Open report
0 /100
Last seen 2025-07-08 03:00
Hits
83
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.167.122 low
Open report
0 /100
Last seen 2025-06-30 03:00
Hits
79
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.166.216 low
Open report
0 /100
Last seen 2024-09-10 03:00
Hits
77
Errors
27
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.210.95 low
Open report
0 /100
Last seen 2025-01-17 02:00
Hits
77
Errors
6
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.146.224 low
Open report
0 /100
Last seen 2025-05-16 03:00
Hits
75
Errors
4
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.3.72 low
Open report
0 /100
Last seen 2024-10-10 03:00
Hits
70
Errors
29
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.187.74 low
Open report
0 /100
Last seen 2026-02-07 02:00
Hits
68
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.25.86 low
Open report
0 /100
Last seen 2025-03-29 03:00
Hits
67
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.42.170 low
Open report
0 /100
Last seen 2025-08-21 03:00
Hits
63
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.177.139 low
Open report
0 /100
Last seen 2025-05-31 03:00
Hits
61
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.0.134 low
Open report
0 /100
Last seen 2024-11-20 02:00
Hits
61
Errors
12
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.107.152 low
Open report
0 /100
Last seen 2024-12-28 02:00
Hits
60
Errors
13
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.182.176 low
Open report
0 /100
Last seen 2025-01-12 02:00
Hits
60
Errors
6
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.86.186 low
Open report
0 /100
Last seen 2025-02-02 02:00
Hits
59
Errors
5
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.221.182 low
Open report
0 /100
Last seen 2025-06-25 03:00
Hits
59
Errors
8
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.184.218 low
Open report
0 /100
Last seen 2025-03-23 02:00
Hits
59
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.42.0 low
Open report
0 /100
Last seen 2025-02-27 02:00
Hits
57
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.108.50 low
Open report
0 /100
Last seen 2024-12-27 02:00
Hits
57
Errors
3
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.56.207 low
Open report
0 /100
Last seen 2025-01-11 02:00
Hits
56
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.152.32 low
Open report
0 /100
Last seen 2024-12-17 02:00
Hits
55
Errors
4
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.165.70 low
Open report
0 /100
Last seen 2024-11-01 02:00
Hits
54
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.211.194 low
Open report
0 /100
Last seen 2024-12-08 02:00
Hits
54
Errors
2
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.120.58 low
Open report
0 /100
Last seen 2025-01-25 02:00
Hits
54
Errors
2
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.69.201 low
Open report
0 /100
Last seen 2024-11-20 02:00
Hits
49
Errors
15
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.164.96 low
Open report
0 /100
Last seen 2024-11-09 02:00
Hits
49
Errors
24
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.181.2 low
Open report
0 /100
Last seen 2025-01-05 02:00
Hits
48
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.56.219 low
Open report
0 /100
Last seen 2024-10-14 03:00
Hits
48
Errors
4
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.98.182 low
Open report
0 /100
Last seen 2025-05-24 03:00
Hits
48
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.108.196 low
Open report
0 /100
Last seen 2025-01-17 02:00
Hits
47
Errors
3
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.214.240 low
Open report
0 /100
Last seen 2026-01-27 02:00
Hits
47
Errors
4
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.9.26 low
Open report
0 /100
Last seen 2026-02-05 02:00
Hits
46
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.193.123 low
Open report
0 /100
Last seen 2025-02-25 02:00
Hits
45
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.93.119 low
Open report
0 /100
Last seen 2025-01-27 02:00
Hits
43
Errors
8
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.226.67 low
Open report
0 /100
Last seen 2025-05-09 03:00
Hits
43
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.97.245 low
Open report
0 /100
Last seen 2024-01-29 02:00
Hits
42
Errors
3
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.161.160 low
Open report
0 /100
Last seen 2025-01-13 02:00
Hits
42
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.221.100 low
Open report
0 /100
Last seen 2025-03-19 02:00
Hits
40
Errors
2
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.71.154 low
Open report
0 /100
Last seen 2025-05-20 03:00
Hits
40
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.99.246 low
Open report
0 /100
Last seen 2025-02-01 02:00
Hits
39
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.14.224 low
Open report
0 /100
Last seen 2024-11-21 02:00
Hits
39
Errors
3
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.211.190 low
Open report
0 /100
Last seen 2024-12-12 02:00
Hits
39
Errors
10
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.0.200 low
Open report
0 /100
Last seen 2025-01-09 02:00
Hits
38
Errors
1
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.105.113 low
Open report
0 /100
Last seen 2024-10-04 03:00
Hits
37
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.201.239 low
Open report
0 /100
Last seen 2025-02-19 02:00
Hits
37
Errors
3
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.105.71 low
Open report
0 /100
Last seen 2024-11-21 02:00
Hits
36
Errors
3
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.56.107.66 low
Open report
0 /100
Last seen 2025-05-14 03:00
Hits
36
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.58.243.112 low
Open report
0 /100
Last seen 2024-09-16 03:00
Hits
36
Errors
0
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.
172.59.56.217 low
Open report
0 /100
Last seen 2024-09-30 03:00
Hits
36
Errors
7
Country
United States
ASN
AS21928
AS Org
T-Mobile USA, Inc.