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 v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
About Zillow
Zillow, officially known as Zillow Group, Inc., is an American tech real-estate marketplace company that was founded in 2006 by co-executive chairmen Rich Barton and Lloyd Frink, former Microsoft executives and founders of Microsoft spin-off Expedia; Spencer Rascoff, a co-founder of Hotwire.com; David Beitel, Zillow's current chief technology officer; and Kristin Acker, Zillow's current technology leadership advisor.
Network profile
Source: PeeringDB →Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 64.42.187.0/24 | 256 |
0.0%
|
ZILLOW, INC. | US | — | — |
| 64.42.189.0/24 | 256 |
0.0%
|
ZILLOW, INC. | US | — | — |
| 64.42.191.0/24 | 256 |
0.0%
|
ZILLOW, INC. | US | New York | New York |
| 192.211.13.0/24 | 256 |
0.0%
|
ZILLOW, INC. | US | — | — |
| 209.133.71.0/24 | 256 |
70.3%
|
ZILLOW, INC. | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS18888 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 |
|---|---|---|
| 209.133.71.0/24 | 21,413 | 2026-08-04 08:03:12 |
| 64.42.187.0/24 | 9,655 | 2026-08-04 08:03:08 |
| 64.42.191.0/24 | 7,640 | 2026-08-04 08:09:56 |
| 192.211.13.0/24 | 6,740 | 2026-08-04 08:03:08 |
| 64.42.189.0/24 | 4,953 | 2026-08-04 08:03:08 |
Frequently Asked Questions
What is AS18888?
AS18888 is an Autonomous System Number assigned to ZILLOW, INC.. 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 AS18888 announce?
AS18888 announces 1.3K IPv4 addresses distributed across 5 routed CIDR prefixes. The network is registered in United States.
Who operates AS18888?
AS18888 is operated by ZILLOW, INC.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS18888 registered in?
AS18888 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
