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
- Multiple-origin (MOAS) routing anomaly −12
- Trust score 53 / 100
Experimental · trust-vectors model v1.2.0 — a transparent heuristic, not a definitive verdict. How it works →
⚠ 1 MOAS prefix — multiple origin ASNs detected
All MOAS anomalies →A previously stable prefix originated by AS11971 is now also announced by another ASN (MOAS — Multiple-Origin AS), detected from our RIPE RIS collectors. Often benign (anycast, multi-homing, or a recent transfer) — but it can signal a route leak or prefix hijack, so it's worth inspecting.
| Prefix | Origin ASNs | Last detected (UTC) |
|---|---|---|
| 148.168.0.0/16 | AS7068, AS11971 | 2026-07-23 21:23:42 |
AS11971 — global IP footprint
Cities where AS11971 has measurable IPv4 allocation. Click any dot to open that city's page. Size and color scale with IP count.
Top CIDR ranges
| CIDR | IPs | PTR Density | Organization | Country | State | City |
|---|---|---|---|---|---|---|
| 148.168.0.0/16 | 65.5K |
0.0%
|
Pfizer Inc. | US | New Jersey | Princeton |
| 148.168.32.0/19 | 8.2K |
0.3%
|
Pfizer Inc. | US | New Jersey | Princeton |
| 148.168.48.0/20 | 4.1K |
0.0%
|
Pfizer Inc. | US | — | — |
| 148.168.32.0/21 | 2.0K |
0.8%
|
Pfizer Inc. | US | — | — |
| 148.168.44.0/22 | 1.0K |
0.0%
|
Pfizer Inc. | US | — | — |
| 148.168.192.0/22 | 1.0K |
0.2%
|
Pfizer Inc. | US | — | — |
| 148.168.224.0/22 | 1.0K |
1.9%
|
Pfizer Inc. | US | — | — |
| 148.168.42.0/23 | 512 |
0.8%
|
Pfizer Inc. | US | — | — |
| 146.240.1.0/24 | 256 |
0.0%
|
Pfizer Inc. | US | North Carolina | Sanford |
| 148.168.40.0/24 | 256 |
2.3%
|
Pfizer Inc. | US | — | — |
BGP Announced Prefixes
Live BGP anomalies →Prefixes AS11971 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 |
|---|---|---|
| 148.168.224.0/22 | 3,888 | 2026-07-23 21:03:38 |
| 148.168.192.0/22 | 3,888 | 2026-07-23 21:03:38 |
| 146.240.1.0/24 | 3,868 | 2026-07-23 20:43:26 |
| 148.168.32.0/19 | 3,858 | 2026-07-23 21:03:38 |
| 148.168.35.0/24 | 3,147 | 2026-07-23 21:04:11 |
| 148.168.192.0/23 | 3,124 | 2026-07-23 21:04:11 |
| 148.168.0.0/16 | 994 | 2026-07-23 20:30:13 |
Frequently Asked Questions
What is AS11971?
AS11971 is an Autonomous System Number assigned to Pfizer 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 AS11971 announce?
AS11971 announces 10.5K IPv4 addresses distributed across 9 routed CIDR prefixes. The network is registered in United States.
Who operates AS11971?
AS11971 is operated by Pfizer Inc.. The organization is based in United States. You can view all IP ranges and related ASNs on the organization page.
What country is AS11971 registered in?
AS11971 is registered in United States. This indicates where the network operator is headquartered, though the IP addresses it announces may serve users globally.
