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 booking.com
Booking.com is a Dutch online travel agency headquartered in Amsterdam, Netherlands, and is a subsidiary of Booking Holdings, together with Agoda, KAYAK. Booking.com is one of the largest online travel agencies and provides lodging reservation services for approximately 3.4 million properties, including 475,000 hotels, motels, and resorts, and 2.9 million homes, apartments in over 220 countries and territories, and in over 40 languages.
Network profile
Source: PeeringDB →Present at 7 internet exchanges: LINX LON1: Main, DE-CIX Frankfurt: DE-CIX Frankfurt Peering LAN, AMS-IX, MegaIX Frankfurt, LINX LON2, NL-ix: Main, DE-CIX Marseille: DE-CIX Marseille Peering LAN
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 5.57.16.0/22 | 1.0K |
12.9%
|
Booking.com BV | NL | — | — |
| 37.10.36.0/23 | 512 |
0.0%
|
Booking.com BV | NL | — | — |
| 37.10.56.0/23 | 512 |
0.0%
|
Booking.com BV | NL | — | — |
| 37.10.60.0/23 | 512 |
0.0%
|
Booking.com BV | NL | — | — |
| 5.57.16.0/24 | 256 |
0.0%
|
Booking.com BV | GB | — | — |
| 5.57.17.0/24 | 256 |
0.0%
|
Booking.com BV | NL | — | — |
| 5.57.18.0/24 | 256 |
0.0%
|
Booking.com BV | GB | — | — |
| 5.57.19.0/24 | 256 |
0.0%
|
Booking.com BV | NL | — | — |
| 5.57.22.0/24 | 256 |
0.4%
|
Booking.com BV | NL | — | — |
| 37.10.0.0/24 | 256 |
1.2%
|
Booking.com BV | NL | — | — |
| 37.10.13.0/24 | 256 |
0.0%
|
Booking.com BV | NL | — | — |
| 37.10.36.0/24 | 256 |
0.0%
|
Booking.com BV | GB | — | — |
| 37.10.37.0/24 | 256 |
0.0%
|
Booking.com BV | NL | — | — |
| 37.10.38.0/24 | 256 |
0.0%
|
Booking.com BV | NL | — | — |
| 37.10.56.0/24 | 256 |
0.0%
|
Booking.com BV | GB | — | — |
| 37.10.57.0/24 | 256 |
0.0%
|
Booking.com BV | NL | — | — |
| 37.10.58.0/24 | 256 |
0.0%
|
Booking.com BV | NL | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS43996 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 |
|---|---|---|
| 37.10.37.0/24 | 27,875 | 2026-07-31 13:48:42 |
| 37.10.60.0/23 | 20,773 | 2026-07-31 13:49:33 |
| 5.57.22.0/24 | 18,740 | 2026-07-31 13:48:43 |
| 5.57.18.0/24 | 17,987 | 2026-07-31 13:48:43 |
| 5.57.19.0/24 | 17,986 | 2026-07-31 13:48:43 |
| 5.57.16.0/24 | 17,874 | 2026-07-31 13:48:43 |
| 5.57.16.0/22 | 17,861 | 2026-07-31 13:48:43 |
| 5.57.17.0/24 | 17,842 | 2026-07-31 13:48:43 |
| 37.10.0.0/24 | 17,615 | 2026-07-31 13:49:33 |
| 37.10.56.0/23 | 16,886 | 2026-07-31 13:49:33 |
| 37.10.13.0/24 | 14,968 | 2026-07-31 13:48:43 |
| 37.10.36.0/24 | 12,557 | 2026-07-31 13:48:43 |
| 37.10.61.0/24 | 11,855 | 2026-07-13 06:46:16 |
| 37.10.38.0/24 | 11,378 | 2026-07-31 13:48:43 |
| 37.10.58.0/24 | 9,002 | 2026-07-31 13:48:43 |
| 37.10.57.0/24 | 8,087 | 2026-07-31 13:48:43 |
| 37.10.56.0/24 | 8,063 | 2026-07-31 13:49:33 |
Frequently Asked Questions
What is AS43996?
AS43996 is an Autonomous System Number assigned to Booking.com BV. 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 AS43996 announce?
AS43996 announces 3.8K IPv4 addresses distributed across 9 routed CIDR prefixes. The network is registered in The Netherlands.
Who operates AS43996?
AS43996 is operated by Booking.com BV. The organization is based in The Netherlands. You can view all IP ranges and related ASNs on the organization page.
What country is AS43996 registered in?
AS43996 is registered in The Netherlands. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
