AS42821
K&K Kommunikationssysteme GmbH
Reputation · trust score
A transparent 0–100 signal. Every entity starts at a neutral baseline of 65; threat-intel blocklists, exposure, reverse-DNS, routing and allocation each adjust it up or down. Higher is more trustworthy.
- Baseline (neutral) 65
- Trust score 65 / 100
Experimental · trust-vectors model v1.3.0 — a transparent heuristic, not a definitive verdict. How it works →
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 77.90.128.0/23 | 512 |
46.7%
|
K&K Kommunikationssysteme GmbH | DE | Bavaria | Augsburg |
| 77.90.132.0/23 | 512 |
8.0%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.136.0/23 | 512 |
13.7%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.146.0/23 | 512 |
3.3%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 213.209.144.0/23 | 512 |
2.9%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.130.0/24 | 256 |
65.6%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.134.0/24 | 256 |
23.8%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.140.0/24 | 256 |
10.5%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.143.0/24 | 256 |
2.7%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.144.0/24 | 256 |
10.2%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 77.90.177.0/24 | 256 |
23.0%
|
K&K Kommunikationssysteme GmbH | DE | Bavaria | Augsburg |
| 185.230.12.0/24 | 256 |
0.0%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 213.209.138.0/24 | 256 |
7.8%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
| 213.209.156.0/24 | 256 |
0.0%
|
K&K Kommunikationssysteme GmbH | DE | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS42821 actually originates in BGP, observed across our RIPE RIS collectors. This live routing view can differ from the registry allocation above.
| Prefix | Announcement samples | Last seen |
|---|---|---|
| 213.209.156.0/24 | 25,899 | 2026-09-15 08:43:35 |
| 213.209.144.0/24 | 25,458 | 2026-10-16 09:51:51 |
| 77.90.177.0/24 | 23,560 | 2026-09-15 08:43:35 |
| 213.209.157.0/24 | 23,408 | 2026-09-15 08:43:35 |
| 213.209.145.0/24 | 23,384 | 2026-09-15 08:43:35 |
| 213.209.138.0/24 | 23,229 | 2026-11-09 15:12:12 |
| 77.90.137.0/24 | 22,415 | 2026-11-09 15:12:11 |
| 77.90.144.0/24 | 22,411 | 2026-11-09 15:12:11 |
| 77.90.129.0/24 | 22,408 | 2026-11-09 15:12:11 |
| 77.90.146.0/24 | 22,405 | 2026-11-09 15:12:11 |
| 77.90.130.0/24 | 22,393 | 2026-11-09 15:12:11 |
| 77.90.132.0/24 | 22,370 | 2026-11-09 15:12:11 |
| 77.90.140.0/24 | 22,368 | 2026-11-09 15:12:11 |
| 77.90.128.0/24 | 22,364 | 2026-11-09 15:12:11 |
| 77.90.136.0/24 | 22,354 | 2026-11-09 15:12:11 |
| 77.90.147.0/24 | 22,336 | 2026-11-09 15:12:11 |
| 77.90.134.0/24 | 22,319 | 2026-11-09 15:12:11 |
| 77.90.143.0/24 | 22,283 | 2026-11-09 15:12:11 |
| 77.90.133.0/24 | 22,211 | 2026-11-09 15:12:11 |
| 77.90.168.0/24 | 19,955 | 2026-09-15 08:43:35 |
| 77.90.186.0/24 | 17,434 | 2026-09-23 13:46:54 |
| 213.209.147.0/24 | 15,690 | 2026-06-24 13:45:05 |
| 213.209.158.0/24 | 15,401 | 2026-06-24 13:45:05 |
| 77.90.148.0/24 | 15,121 | 2026-06-24 13:45:05 |
| 213.209.134.0/24 | 15,119 | 2026-10-26 23:23:24 |
| 77.90.190.0/24 | 15,018 | 2026-06-24 13:45:05 |
| 77.90.156.0/24 | 14,908 | 2026-06-24 13:45:05 |
| 77.90.157.0/24 | 14,631 | 2026-06-24 13:45:05 |
| 77.90.191.0/24 | 14,580 | 2026-06-24 13:45:05 |
| 77.90.166.0/24 | 14,328 | 2026-06-24 13:45:05 |
| 77.90.173.0/24 | 14,128 | 2026-06-24 13:45:05 |
| 213.209.141.0/24 | 13,964 | 2026-07-31 21:42:05 |
| 77.90.159.0/24 | 13,750 | 2026-06-24 13:45:05 |
| 213.209.135.0/24 | 13,063 | 2026-09-11 20:30:23 |
| 77.90.162.0/24 | 12,605 | 2026-06-24 13:45:05 |
| 77.90.169.0/24 | 12,589 | 2026-06-24 13:45:05 |
| 77.90.160.0/24 | 12,582 | 2026-06-24 13:45:05 |
| 77.90.163.0/24 | 12,579 | 2026-06-24 13:45:05 |
| 77.90.172.0/24 | 12,577 | 2026-06-24 13:45:05 |
| 77.90.170.0/24 | 12,546 | 2026-06-24 13:45:05 |
| 77.90.161.0/24 | 12,545 | 2026-06-24 13:45:05 |
| 77.90.171.0/24 | 12,466 | 2026-06-24 13:45:05 |
| 213.209.139.0/24 | 10,805 | 2026-06-24 13:45:05 |
| 213.209.136.0/24 | 9,745 | 2026-09-15 08:43:35 |
| 185.230.12.0/24 | 9,044 | 2026-10-16 09:51:51 |
| 77.90.139.0/24 | 8,243 | 2026-07-31 21:42:05 |
| 77.90.165.0/24 | 6,294 | 2026-06-24 13:45:05 |
| 213.209.143.0/24 | 5,529 | 2026-06-24 13:45:05 |
| 77.90.141.0/24 | 3,578 | 2026-06-09 22:38:51 |
| 77.90.142.0/24 | 3,432 | 2026-06-09 22:38:51 |
Showing top 50 of 59 announced prefixes by sample volume.
Frequently Asked Questions
What is AS42821?
AS42821 is an Autonomous System Number assigned to K&K Kommunikationssysteme GmbH. An ASN identifies a network that controls a specific set of IP addresses and determines how traffic is routed across the internet via BGP (Border Gateway Protocol).
How many IP addresses does AS42821 announce?
AS42821 announces 3.6K IPv4 addresses distributed across 10 routed CIDR prefixes. The network is registered in Germany.
Who operates AS42821?
AS42821 is operated by K&K Kommunikationssysteme GmbH. The organization is based in Germany. You can view all IP ranges and related ASNs on the organization page.
What country is AS42821 registered in?
AS42821 is registered in Germany. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
