Telecom Network APIs — Silent Authentication & Anti-Fraud
Silent Network Authentication (SNA), SIM Swap Detection, KYC, and device location. Bank-level telecom security with ANATEL compliance.
TL;DR — Summary
Frictionless Network Security
Silent Network Authentication (SNA)
Authenticate users invisibly by checking the association between their phone number and active data session. Zero user friction.
SIM Swap Detection
Detect recent SIM card changes before authorizing high-risk transactions. Decrease banking fraud by up to 80%.
Number Verification (KYC)
Validate if the phone number exists, is active, and matches the correct type (prepaid/postpaid). Essential for KYC onboarding.
Device Location
Obtain approximate network-based device location (without GPS permissions). Perfect for geolocation fraud checks.
Number Portability Check
Check if a mobile line was ported and identify its current carrier. Optimize message routing and reduce costs.
Fraud prevention for banks and fintechs
The Brazilian financial ecosystem loses billions annually to account takeover fraud and SIM Swap scams. BulkSMS's Network APIs reduce this risk by up to 80% without adding any friction for legitimate users.
- Detect SIM Swap events before authorizing Pix transfers
- Authenticate via SNA with zero visible OTP codes
- Verify phone numbers during KYC and digital signups
- Monitor network behavior and connection change anomalies
SIM Swap fraud reduction
Signup conversion improvement
Reduced 2FA false positives
* Average across financial segment clients (2025)
We operate in full compliance with ANATEL & LGPD
All Network API requests are based on bilateral carrier agreements with Brazilian operators, authorized by ANATEL and strictly compliant with the General Data Protection Law.
What our customers say
about our services
"The SIM Swap API saved our fintech from catastrophic account takeover fraud. Indispensable telemetric check."
Paulo Mendes
São Paulo - SP
"We query the last SIM card change timestamp invisibly. Legitimate clients suffer zero onboarding friction."
Alessandra Negrini
Rio de Janeiro - RJ
"Silent Network Authentication (SNA) verifies identities invisibly via mobile carrier towers. Amazing technology."
Selton Mello
Paraná - PR
"GSMA Open Gateway integration approved directly with the tier-1 telcos (Vivo, Claro, TIM) with local support."
Letícia Sabatella
Minas Gerais - MG
"We eliminated account porting social engineering fraud by checking SIM changes during high-value Pix transfers."
Caco Ciocler
São Paulo - SP
"Sub-second API response time. Crucial to guarantee verify sweeps do not slow down our client sign-up funnel."
Cláudia Raia
São Paulo - SP
"Local log hosting in São Paulo and strict LGPD compliance. Paramount for our compliance committee audits."
Tarcísio Filho
Rio de Janeiro - RJ
"Bulk SMS's Network APIs leveled up our digital security. The best technical decision we made this year."
Glória Pires
Paraná - PR
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Network APIs Frequently Asked Questions
Add network security to your application
Silent authentication and anti-fraud for the Brazilian financial market.