Data as of Nov 12, 2026
143.204.78.0/23
No anonymizer space · no proxy exits in 30 daysAmazon.com, Inc. · reallocated from Amazon Technologies Inc.
Registrations in this block
The registry's network records over the announcement: those covering it, widest first, then every record inside it, under its parent.
| Range | Addresses | Netname | Holder | Type | Created | Abuse contact |
|---|---|---|---|---|---|---|
| 143.204.0.0/16 | 65,536 | AT-88-Z | Amazon Technologies Inc. (AT-88-Z) · US | Direct Allocation | Jan 5, 2018 | trustandsafety@ |
| └ 143.204.0.0/16 | 65,536 | AMAZO-CF | Amazon.com, Inc. (AMAZON-4) · US | Reallocated | May 8, 2018 | trustandsafety@ |
Network & registry
IPv4 market
Holder
- Organization
- Amazon Technologies Inc.
- Handle
- AT-88-Z
- Range
- 143.
204. 0. 0/ 16 - Registration type
- Direct Allocation
- Record created
- Jan 5, 2018
- Reallocated to
- Amazon.com, Inc. (AMAZON-4)
- Reallocated
- May 8, 2018
Origin network
AS16509
US
- Name
- Amazon.com, Inc.
- Type
- Hosting
- Registered
- May 4, 2000
- Domain
- amazon.com
- Website
- www.amazon.com
- Industry
- Hosting and Cloud Provider
- Spamhaus ASN-DROP
- not listed
- VPN servers
- 300
Routing timeline
Who has announced this prefix
Summary
Routing history
- Pattern
- Stable
- First seen
- Jul 2025
- Current origin since
- Mar 2026 · 8 mo
- Origin networks
- 1
RPKI
Route origin authorizations
| ROA prefix | ASN | Max len | Anchor | Verdict |
|---|---|---|---|---|
| 143.204.0.0/16 | AS16509 | /24 | ARIN | RPKI valid |
IRR
Route objects on the exact prefix
| Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|
| AS16509 | RADB | Amazon-Cloudfront | MAINT-AS16509 | Nov 13, 2023 |
IRR inside
Route objects inside
| Prefix | Origin | Registry | Description | Maintainer | Modified |
|---|---|---|---|---|---|
| 143.204.78.0/24 | AS16509 | RADB | Amazon-Cloudfront | MAINT-AS16509 | Nov 13, 2023 |
| 143.204.79.0/24 | AS16509 | RADB | Amazon-Cloudfront | MAINT-AS16509 | Nov 13, 2023 |
Whois
Registration for this announcement
- Range
- 143.
204. 0. 0/ 16 - Netname
- AMAZO-CF
- Registrant
- Amazon.com, Inc.
- Organization
- Amazon.com, Inc. (AMAZON-4)
- Org address
- 1918 8th Ave, SEATTLE, WA, 98101-1244
- Org country
- US
- Type
- Reallocated
- Handle
- NET-143-204-0-0-2
- Parent
- NET-143-204-0-0-1
- Created
- May 8, 2018
- RIR
- ARIN
- Country
- US
- Delegated
- Jan 5, 2018
- Status
- assigned
Report abuse
Abuse contact
- trustandsafety@
support. aws. com - Name
- Amazon EC2 Abuse
- Phone
- +1-206-555-0000
- Handle
- AEA8-ARIN